diff --git a/_maps/map_files/MetaStation/MetaStation.dmm b/_maps/map_files/MetaStation/MetaStation.dmm
index 699fbc544ef..96245eaf787 100644
--- a/_maps/map_files/MetaStation/MetaStation.dmm
+++ b/_maps/map_files/MetaStation/MetaStation.dmm
@@ -29174,7 +29174,9 @@
 /obj/item/mod/construction/core{
 	pixel_y = 4
 	},
-/obj/structure/closet/crate,
+/obj/structure/closet/crate/science{
+	name = "MOD core crate"
+	},
 /turf/open/floor/iron/dark,
 /area/science/robotics/lab)
 "icG" = (
diff --git a/code/__DEFINES/exosuit_fab.dm b/code/__DEFINES/exosuit_fab.dm
index f49f68bd0f3..8a8a6ad65c8 100644
--- a/code/__DEFINES/exosuit_fab.dm
+++ b/code/__DEFINES/exosuit_fab.dm
@@ -30,3 +30,18 @@
 #define EXOSUIT_MODULE_COMBAT EXOSUIT_MODULE_GYGAX | EXOSUIT_MODULE_HONK | EXOSUIT_MODULE_DURAND | EXOSUIT_MODULE_PHAZON
 /// Module is compatible with "Medical" Exosuit modelsm - Odysseus
 #define EXOSUIT_MODULE_MEDICAL EXOSUIT_MODULE_ODYSSEUS
+
+/// Module is standard in use
+#define MODULE_GENERAL "General"
+/// Module is preferred for engineering uses
+#define MODULE_ENGINEERING "Engineering"
+/// Module is preferred for medical uses
+#define MODULE_MEDICAL "Medical"
+/// Module is preferred for science uses
+#define MODULE_SCIENCE "Science"
+/// Module is preferred for security uses
+#define MODULE_SECURITY "Security"
+/// Module is preferred for supply uses
+#define MODULE_SUPPLY "Supply"
+/// Module is preferred for service uses
+#define MODULE_SERVICE "Service"
diff --git a/code/datums/components/fullauto.dm b/code/datums/components/fullauto.dm
index b0341d9bd13..3dc1dbd4e2c 100644
--- a/code/datums/components/fullauto.dm
+++ b/code/datums/components/fullauto.dm
@@ -117,7 +117,7 @@
 	if(get_dist(source.mob, _target) < 2) //Adjacent clicking.
 		return
 
-	if(isnull(location)) //Clicking on a screen object.
+	if(isnull(location) || istype(_target, /atom/movable/screen)) //Clicking on a screen object.
 		if(_target.plane != CLICKCATCHER_PLANE) //The clickcatcher is a special case. We want the click to trigger then, under it.
 			return //If we click and drag on our worn backpack, for example, we want it to open instead.
 		_target = params_to_turf(modifiers["screen-loc"], get_turf(source.eye), source)
diff --git a/code/game/objects/items/devices/aicard.dm b/code/game/objects/items/devices/aicard.dm
index 5e06898bac8..66cb976738e 100644
--- a/code/game/objects/items/devices/aicard.dm
+++ b/code/game/objects/items/devices/aicard.dm
@@ -33,13 +33,14 @@
 		target.transfer_ai(AI_TRANS_FROM_CARD, user, AI, src)
 		if(!AI)
 			log_combat(user, our_ai, "uploaded", src, "to [target].")
+			update_appearance()
 			return TRUE
 	else //No AI on the card, therefore the user wants to download one.
 		target.transfer_ai(AI_TRANS_TO_CARD, user, null, src)
 		if(AI)
 			log_combat(user, AI, "carded", src)
+			update_appearance()
 			return TRUE
-	update_appearance() //Whatever happened, update the card's state (icon, name) to match.
 	return ..()
 
 /obj/item/aicard/update_icon_state()
diff --git a/code/modules/antagonists/nukeop/clownop.dm b/code/modules/antagonists/nukeop/clownop.dm
index 8ccd6347596..4930ff2ef04 100644
--- a/code/modules/antagonists/nukeop/clownop.dm
+++ b/code/modules/antagonists/nukeop/clownop.dm
@@ -70,6 +70,7 @@
 
 	back = /obj/item/mod/control/pre_equipped/syndicate_empty
 	mask = /obj/item/clothing/mask/gas/clown_hat
+	uniform = /obj/item/clothing/under/syndicate
 
 /datum/outfit/clown_operative/post_equip(mob/living/carbon/human/H, visualsOnly)
 	var/obj/item/mod/module/armor_booster/booster = locate() in H.back
@@ -81,6 +82,7 @@
 
 	back = /obj/item/mod/control/pre_equipped/syndicate_empty/elite
 	mask = /obj/item/clothing/mask/gas/clown_hat
+	uniform = /obj/item/clothing/under/syndicate
 
 /datum/outfit/clown_operative_elite/post_equip(mob/living/carbon/human/H, visualsOnly)
 	var/obj/item/mod/module/armor_booster/elite/booster = locate() in H.back
diff --git a/code/modules/antagonists/nukeop/nukeop.dm b/code/modules/antagonists/nukeop/nukeop.dm
index 604e4d0f7f4..b72a433df85 100644
--- a/code/modules/antagonists/nukeop/nukeop.dm
+++ b/code/modules/antagonists/nukeop/nukeop.dm
@@ -173,6 +173,7 @@
 	name = "Nuclear Operative (Preview only)"
 
 	back = /obj/item/mod/control/pre_equipped/syndicate_empty
+	uniform = /obj/item/clothing/under/syndicate
 
 /datum/outfit/nuclear_operative/post_equip(mob/living/carbon/human/H, visualsOnly)
 	var/obj/item/mod/module/armor_booster/booster = locate() in H.back
@@ -183,6 +184,7 @@
 	name = "Nuclear Operative (Elite, Preview only)"
 
 	back = /obj/item/mod/control/pre_equipped/syndicate_empty/elite
+	uniform = /obj/item/clothing/under/syndicate
 	l_hand = /obj/item/modular_computer/tablet/nukeops
 	r_hand = /obj/item/shield/energy
 
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 8ebc09848de..732c7a1a08c 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -173,11 +173,11 @@
 /mob/living/carbon/human/proc/get_thermal_protection()
 	var/thermal_protection = 0 //Simple check to estimate how protected we are against multiple temperatures
 	if(wear_suit)
-		if(wear_suit.max_heat_protection_temperature >= FIRE_SUIT_MAX_TEMP_PROTECT)
-			thermal_protection += (wear_suit.max_heat_protection_temperature*0.7)
+		if((wear_suit.heat_protection & CHEST) && (wear_suit.max_heat_protection_temperature >= FIRE_SUIT_MAX_TEMP_PROTECT))
+			thermal_protection += (wear_suit.max_heat_protection_temperature * 0.7)
 	if(head)
-		if(head.max_heat_protection_temperature >= FIRE_HELM_MAX_TEMP_PROTECT)
-			thermal_protection += (head.max_heat_protection_temperature*THERMAL_PROTECTION_HEAD)
+		if((head.heat_protection & HEAD) && (head.max_heat_protection_temperature >= FIRE_HELM_MAX_TEMP_PROTECT))
+			thermal_protection += (head.max_heat_protection_temperature * THERMAL_PROTECTION_HEAD)
 	thermal_protection = round(thermal_protection)
 	return thermal_protection
 
diff --git a/code/modules/mob/living/init_signals.dm b/code/modules/mob/living/init_signals.dm
index 8e1fcbe5219..78be2badfb5 100644
--- a/code/modules/mob/living/init_signals.dm
+++ b/code/modules/mob/living/init_signals.dm
@@ -109,7 +109,10 @@
 /mob/living/proc/on_forced_standing_trait_loss(datum/source)
 	SIGNAL_HANDLER
 
-	if(resting || HAS_TRAIT(src, TRAIT_FLOORED))
+	if(HAS_TRAIT(src, TRAIT_FLOORED))
+		on_fall()
+		set_lying_down()
+	else if(resting)
 		set_lying_down()
 
 /// Called when [TRAIT_HANDS_BLOCKED] is added to the mob.
diff --git a/code/modules/mob/living/living.dm b/code/modules/mob/living/living.dm
index 1132f45ea84..0446c624b25 100644
--- a/code/modules/mob/living/living.dm
+++ b/code/modules/mob/living/living.dm
@@ -575,7 +575,6 @@
 /mob/living/proc/set_lying_down(new_lying_angle)
 	set_body_position(LYING_DOWN)
 
-
 /// Proc to append behavior related to lying down.
 /mob/living/proc/on_lying_down(new_lying_angle)
 	if(layer == initial(layer)) //to avoid things like hiding larvas.
diff --git a/code/modules/mod/mod_actions.dm b/code/modules/mod/mod_actions.dm
index 2c27879e798..70d753561eb 100644
--- a/code/modules/mod/mod_actions.dm
+++ b/code/modules/mod/mod_actions.dm
@@ -2,29 +2,30 @@
 	background_icon_state = "bg_tech_blue"
 	icon_icon = 'icons/mob/actions/actions_mod.dmi'
 	check_flags = AB_CHECK_CONSCIOUS
+	/// Whether this action is intended for the AI. Stuff breaks a lot if this is done differently.
+	var/ai_action = FALSE
+	/// The MODsuit linked to this action
 	var/obj/item/mod/control/mod
 
 /datum/action/item_action/mod/New(Target)
 	..()
 	mod = Target
+	if(ai_action)
+		background_icon_state = ACTION_BUTTON_DEFAULT_BACKGROUND
 
-/datum/action/item_action/mod/Grant(mob/M)
-	if(owner)
-		Share(M)
+/datum/action/item_action/mod/Grant(mob/user)
+	if(ai_action && user != mod.ai)
 		return
-	..()
+	else if(!ai_action && user == mod.ai)
+		return
+	return ..()
 
-/datum/action/item_action/mod/Remove(mob/M)
-	var/mob_to_grant
-	for(var/datum/weakref/reference as anything in sharers)
-		var/mob/freeloader = reference.resolve()
-		if(!freeloader)
-			continue
-		mob_to_grant = freeloader
-		break
-	..()
-	if(mob_to_grant)
-		Grant(mob_to_grant)
+/datum/action/item_action/mod/Remove(mob/user)
+	if(ai_action && user != mod.ai)
+		return
+	else if(!ai_action && user == mod.ai)
+		return
+	return ..()
 
 /datum/action/item_action/mod/deploy
 	name = "Deploy MODsuit"
@@ -37,6 +38,9 @@
 	mod.choose_deploy(usr)
 	return TRUE
 
+/datum/action/item_action/mod/deploy/ai
+	ai_action = TRUE
+
 /datum/action/item_action/mod/activate
 	name = "Activate MODsuit"
 	desc = "Activate/Deactivate the MODsuit."
@@ -48,6 +52,9 @@
 	mod.toggle_activate(usr)
 	return TRUE
 
+/datum/action/item_action/mod/activate/ai
+	ai_action = TRUE
+
 /datum/action/item_action/mod/module
 	name = "Toggle Module"
 	desc = "Toggle a MODsuit module."
@@ -59,6 +66,9 @@
 	mod.quick_module(usr)
 	return TRUE
 
+/datum/action/item_action/mod/module/ai
+	ai_action = TRUE
+
 /datum/action/item_action/mod/panel
 	name = "MODsuit Panel"
 	desc = "Open the MODsuit's panel."
@@ -69,3 +79,6 @@
 		return FALSE
 	mod.ui_interact(usr)
 	return TRUE
+
+/datum/action/item_action/mod/panel/ai
+	ai_action = TRUE
diff --git a/code/modules/mod/mod_ai.dm b/code/modules/mod/mod_ai.dm
index f470fb8046c..26bf7607b34 100644
--- a/code/modules/mod/mod_ai.dm
+++ b/code/modules/mod/mod_ai.dm
@@ -22,10 +22,7 @@
 			intAI.forceMove(card)
 			card.AI = intAI
 			for(var/datum/action/action as anything in actions)
-				if(action.owner == intAI)
-					action.Remove(intAI)
-				else
-					action.Unshare(intAI)
+				action.Remove(intAI)
 			intAI.controlled_equipment = null
 			intAI.remote_control = null
 			balloon_alert(intAI, "transferred to a card")
@@ -67,6 +64,7 @@
 #define WEARER_DELAY 1
 #define LONE_DELAY 5
 #define CELL_PER_STEP DEFAULT_CELL_DRAIN * 2.5
+#define AI_FALL_TIME 1 SECONDS
 
 /obj/item/mod/control/relaymove(mob/user, direction)
 	if((!active && wearer) || !cell || cell.charge < CELL_PER_STEP  || user != ai || !COOLDOWN_FINISHED(src, cooldown_mod_move) || (wearer?.pulledby?.grab_state > GRAB_PASSIVE))
@@ -75,6 +73,9 @@
 	COOLDOWN_START(src, cooldown_mod_move, movedelay * timemodifier + slowdown)
 	playsound(src, 'sound/mecha/mechmove01.ogg', 25, TRUE)
 	cell.charge = max(0, cell.charge - CELL_PER_STEP)
+	if(wearer)
+		ADD_TRAIT(wearer, TRAIT_FORCED_STANDING, MOD_TRAIT)
+		addtimer(CALLBACK(src, .proc/ai_fall), AI_FALL_TIME, TIMER_UNIQUE | TIMER_OVERRIDE)
 	if(ismovable(wearer?.loc))
 		return wearer.loc.relaymove(wearer, direction)
 	if(wearer && !wearer.Process_Spacemove(direction))
@@ -86,3 +87,54 @@
 #undef WEARER_DELAY
 #undef LONE_DELAY
 #undef CELL_PER_STEP
+
+/obj/item/mod/control/proc/ai_fall()
+	if(!wearer)
+		return
+	REMOVE_TRAIT(wearer, TRAIT_FORCED_STANDING, MOD_TRAIT)
+
+/obj/item/mod/ai_minicard
+	name = "AI mini-card"
+	desc = "A small card designed to eject dead AIs. You could use an intellicard to recover it."
+	icon = 'icons/obj/aicards.dmi'
+	icon_state = "minicard"
+	var/datum/weakref/stored_ai
+
+/obj/item/mod/ai_minicard/Initialize(mapload, mob/living/silicon/ai/ai)
+	. = ..()
+	if(!ai)
+		return
+	ai.apply_damage(150, BURN)
+	INVOKE_ASYNC(ai, /mob/living/silicon/ai.proc/death)
+	ai.forceMove(src)
+	stored_ai = WEAKREF(ai)
+	icon_state = "minicard-filled"
+
+/obj/item/mod/ai_minicard/Destroy()
+	QDEL_NULL(stored_ai)
+	return ..()
+
+/obj/item/mod/ai_minicard/examine(mob/user)
+	. = ..()
+	. += span_notice("You see [stored_ai.resolve() || "no AI"] stored inside.")
+
+/obj/item/mod/ai_minicard/transfer_ai(interaction, mob/user, mob/living/silicon/ai/intAI, obj/item/aicard/card)
+	. = ..()
+	if(!.)
+		return
+	if(interaction != AI_TRANS_TO_CARD)
+		return
+	var/mob/living/silicon/ai/ai = stored_ai.resolve()
+	if(!ai)
+		balloon_alert(user, "no AI!")
+		return
+	balloon_alert(user, "transferring to card...")
+	if(!do_after(user, 5 SECONDS, target = src) || !ai)
+		balloon_alert(user, "interrupted!")
+		return
+	icon_state = "minicard"
+	ai.forceMove(card)
+	card.AI = ai
+	ai.notify_ghost_cloning("You have been recovered from the wreckage!", source = card)
+	balloon_alert(user, "AI transferred to card")
+	stored_ai = null
diff --git a/code/modules/mod/mod_clothes.dm b/code/modules/mod/mod_clothes.dm
index 37045015d66..917a6bf5707 100644
--- a/code/modules/mod/mod_clothes.dm
+++ b/code/modules/mod/mod_clothes.dm
@@ -29,6 +29,9 @@
 		QDEL_NULL(mod)
 	return ..()
 
+/obj/item/clothing/head/helmet/space/mod/atom_destruction(damage_flag)
+	return mod.atom_destruction(damage_flag)
+
 /obj/item/clothing/suit/armor/mod
 	name = "MOD chestplate"
 	desc = "A chestplate for a MODsuit."
@@ -56,6 +59,9 @@
 		QDEL_NULL(mod)
 	return ..()
 
+/obj/item/clothing/suit/armor/mod/atom_destruction(damage_flag)
+	return mod.atom_destruction(damage_flag)
+
 /obj/item/clothing/gloves/mod
 	name = "MOD gauntlets"
 	desc = "A pair of gauntlets for a MODsuit."
@@ -80,8 +86,12 @@
 		QDEL_NULL(mod)
 	return ..()
 
-/// Replaces these gloves on the wearer with the overslot ones
+/obj/item/clothing/gloves/mod/atom_destruction(damage_flag)
+	overslot.forceMove(drop_location())
+	overslot = null
+	return mod.atom_destruction(damage_flag)
 
+/// Replaces these gloves on the wearer with the overslot ones
 /obj/item/clothing/gloves/mod/proc/show_overslot()
 	if(!overslot)
 		return
@@ -114,6 +124,11 @@
 		QDEL_NULL(mod)
 	return ..()
 
+/obj/item/clothing/shoes/mod/atom_destruction(damage_flag)
+	overslot.forceMove(drop_location())
+	overslot = null
+	return mod.atom_destruction(damage_flag)
+
 /// Replaces these shoes on the wearer with the overslot ones
 /obj/item/clothing/shoes/mod/proc/show_overslot()
 	if(!overslot)
diff --git a/code/modules/mod/mod_control.dm b/code/modules/mod/mod_control.dm
index 8ca7dc8573f..ef3da163ae6 100644
--- a/code/modules/mod/mod_control.dm
+++ b/code/modules/mod/mod_control.dm
@@ -16,7 +16,16 @@
 	strip_delay = 10 SECONDS
 	slowdown = 2
 	armor = list(MELEE = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 10)
-	actions_types = list(/datum/action/item_action/mod/deploy, /datum/action/item_action/mod/activate, /datum/action/item_action/mod/module, /datum/action/item_action/mod/panel)
+	actions_types = list(
+		/datum/action/item_action/mod/deploy,
+		/datum/action/item_action/mod/activate,
+		/datum/action/item_action/mod/panel,
+		/datum/action/item_action/mod/module,
+		/datum/action/item_action/mod/deploy/ai,
+		/datum/action/item_action/mod/activate/ai,
+		/datum/action/item_action/mod/panel/ai,
+		/datum/action/item_action/mod/module/ai,
+	)
 	resistance_flags = NONE
 	max_heat_protection_temperature = SPACE_SUIT_MAX_TEMP_PROTECT
 	min_cold_protection_temperature = SPACE_SUIT_MIN_TEMP_PROTECT
@@ -165,6 +174,41 @@
 	QDEL_NULL(cell)
 	return ..()
 
+/obj/item/mod/control/atom_destruction(damage_flag)
+	for(var/obj/item/mod/module/module as anything in modules)
+		for(var/obj/item/item in module)
+			item.forceMove(drop_location())
+	if(ai)
+		ai.controlled_equipment = null
+		ai.remote_control = null
+		for(var/datum/action/action as anything in actions)
+			if(action.owner == ai)
+				action.Remove(ai)
+		new /obj/item/mod/ai_minicard(drop_location(), ai)
+	return ..()
+
+/obj/item/mod/control/examine(mob/user)
+	. = ..()
+	if(active)
+		. += span_notice("Cell power: [cell ? "[round(cell.percent(), 1)]%" : "No cell"].")
+		. += span_notice("Selected module: [selected_module || "None"].")
+	if(!open && !active)
+		. += span_notice("You could put it on your <b>back</b> to turn it on.")
+		. += span_notice("You could open the cover with a <b>screwdriver</b>.")
+	else if(open)
+		. += span_notice("You could close the cover with a <b>screwdriver</b>.")
+		. += span_notice("You could use <b>modules</b> on it to install them.")
+		. += span_notice("You could remove modules with a <b>crowbar</b>.")
+		. += span_notice("You could update the access with an <b>ID</b>.")
+		if(cell)
+			. += span_notice("You could remove the cell with an <b>empty hand</b>.")
+		else
+			. += span_notice("You could use a <b>cell</b> on it to install one.")
+		if(ai)
+			. += span_notice("You could remove [ai] with an <b>intellicard</b>")
+		else
+			. += span_notice("You could install an AI with an <b>intellicard</b>.")
+
 /obj/item/mod/control/process(delta_time)
 	if(seconds_electrified > MACHINE_NOT_ELECTRIFIED)
 		seconds_electrified--
@@ -248,13 +292,13 @@
 		balloon_alert(user, "deactivate suit first!")
 		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
 		return FALSE
-	balloon_alert(user, "[open ? "closing" : "opening"] panel...")
+	balloon_alert(user, "[open ? "closing" : "opening"] cover...")
 	screwdriver.play_tool_sound(src, 100)
 	if(screwdriver.use_tool(src, user, 1 SECONDS))
 		if(active || activating)
 			balloon_alert(user, "deactivate suit first!")
 		screwdriver.play_tool_sound(src, 100)
-		balloon_alert(user, "panel [open ? "closed" : "opened"]")
+		balloon_alert(user, "cover [open ? "closed" : "opened"]")
 		open = !open
 	else
 		balloon_alert(user, "interrupted!")
@@ -263,7 +307,7 @@
 /obj/item/mod/control/crowbar_act(mob/living/user, obj/item/crowbar)
 	. = ..()
 	if(!open)
-		balloon_alert(user, "open the panel first!")
+		balloon_alert(user, "open the cover first!")
 		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
 		return FALSE
 	if(!allowed(user))
@@ -290,14 +334,14 @@
 /obj/item/mod/control/attackby(obj/item/attacking_item, mob/living/user, params)
 	if(istype(attacking_item, /obj/item/mod/module))
 		if(!open)
-			balloon_alert(user, "open the panel first!")
+			balloon_alert(user, "open the cover first!")
 			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
 			return FALSE
 		install(attacking_item, user)
 		return TRUE
 	else if(istype(attacking_item, /obj/item/stock_parts/cell))
 		if(!open)
-			balloon_alert(user, "open the panel first!")
+			balloon_alert(user, "open the cover first!")
 			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
 			return FALSE
 		if(cell)
@@ -342,13 +386,15 @@
 
 /obj/item/mod/control/emp_act(severity)
 	. = ..()
-	to_chat(wearer, span_notice("[severity > 1 ? "Light" : "Strong"] electromagnetic pulse detected!"))
-	if(!active || !wearer || . & EMP_PROTECT_CONTENTS)
+	if(!active || !wearer)
 		return
-	selected_module = null
+	to_chat(wearer, span_notice("[severity > 1 ? "Light" : "Strong"] electromagnetic pulse detected!"))
+	if(. & EMP_PROTECT_CONTENTS)
+		return
+	selected_module.on_deactivation()
 	wearer.apply_damage(10 / severity, BURN, spread_damage=TRUE)
 	to_chat(wearer, span_danger("You feel [src] heat up from the EMP, burning you slightly."))
-	if (wearer.stat < UNCONSCIOUS && prob(10))
+	if(wearer.stat < UNCONSCIOUS && prob(10))
 		wearer.emote("scream")
 
 /obj/item/mod/control/on_outfit_equip(mob/living/carbon/human/outfit_wearer, visuals_only, item_slot)
@@ -377,6 +423,7 @@
 	wearer = user
 	RegisterSignal(wearer, COMSIG_ATOM_EXITED, .proc/on_exit)
 	RegisterSignal(wearer, COMSIG_PROCESS_BORGCHARGER_OCCUPANT, .proc/on_borg_charge)
+	RegisterSignal(src, COMSIG_ITEM_PRE_UNEQUIP, .proc/on_unequip)
 	update_cell_alert()
 	for(var/obj/item/mod/module/module as anything in modules)
 		module.on_equip()
@@ -385,9 +432,17 @@
 	for(var/obj/item/mod/module/module as anything in modules)
 		module.on_unequip()
 	UnregisterSignal(wearer, list(COMSIG_ATOM_EXITED, COMSIG_PROCESS_BORGCHARGER_OCCUPANT))
+	UnregisterSignal(src, COMSIG_ITEM_PRE_UNEQUIP)
 	wearer.clear_alert("mod_charge")
 	wearer = null
 
+/obj/item/mod/control/proc/on_unequip()
+	SIGNAL_HANDLER
+
+	for(var/obj/item/part in mod_parts)
+		if(part.loc != src)
+			return COMPONENT_ITEM_BLOCK_UNEQUIP
+
 /obj/item/mod/control/proc/update_flags()
 	var/list/used_skin = theme.skins[skin]
 	for(var/obj/item/clothing/part as anything in mod_parts)
@@ -420,17 +475,21 @@
 			continue
 		display_names[module.name] = REF(module)
 		var/image/module_image = image(icon = module.icon, icon_state = module.icon_state)
+		if(module == selected_module)
+			module_image.underlays += image(icon = 'icons/hud/radial.dmi', icon_state = "module_selected")
+		else if(module.active)
+			module_image.underlays += image(icon = 'icons/hud/radial.dmi', icon_state = "module_active")
 		items += list(module.name = module_image)
 	if(!length(items))
 		return
-	var/pick = show_radial_menu(user, src, items, custom_check = FALSE, require_near = TRUE)
+	var/pick = show_radial_menu(user, src, items, custom_check = FALSE, require_near = TRUE, tooltips = TRUE)
 	if(!pick)
 		return
 	var/module_reference = display_names[pick]
-	var/obj/item/mod/module/selected_module = locate(module_reference) in modules
-	if(!istype(selected_module) || user.incapacitated())
+	var/obj/item/mod/module/picked_module = locate(module_reference) in modules
+	if(!istype(picked_module) || user.incapacitated())
 		return
-	selected_module.on_select()
+	picked_module.on_select()
 
 /obj/item/mod/control/proc/paint(mob/user, obj/item/paint)
 	if(length(theme.skins) <= 1)
@@ -557,3 +616,4 @@
 	if(!cell)
 		return
 	cell.give(amount)
+	update_cell_alert()
diff --git a/code/modules/mod/mod_theme.dm b/code/modules/mod/mod_theme.dm
index 174cc1bab32..2b0af4223c0 100644
--- a/code/modules/mod/mod_theme.dm
+++ b/code/modules/mod/mod_theme.dm
@@ -529,7 +529,6 @@
 			CHESTPLATE_FLAGS = list(
 				UNSEALED_CLOTHING = THICKMATERIAL,
 				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
-				SEALED_INVISIBILITY = HIDEJUMPSUIT,
 			),
 			GAUNTLETS_FLAGS = list(
 				UNSEALED_CLOTHING = THICKMATERIAL,
diff --git a/code/modules/mod/mod_types.dm b/code/modules/mod/mod_types.dm
index af482e50f43..2ca2f791c7d 100644
--- a/code/modules/mod/mod_types.dm
+++ b/code/modules/mod/mod_types.dm
@@ -55,6 +55,10 @@
 	cell = /obj/item/stock_parts/cell/hyper
 	initial_modules = list(/obj/item/mod/module/storage/large_capacity, /obj/item/mod/module/welding, /obj/item/mod/module/holster, /obj/item/mod/module/pathfinder)
 
+/obj/item/mod/control/pre_equipped/cosmohonk
+	theme = /datum/mod_theme/cosmohonk
+	initial_modules = list(/obj/item/mod/module/storage, /obj/item/mod/module/bikehorn)
+
 /obj/item/mod/control/pre_equipped/traitor
 	theme = /datum/mod_theme/syndicate
 	cell = /obj/item/stock_parts/cell/super
diff --git a/code/modules/mod/modules/modules.dm b/code/modules/mod/modules/modules.dm
index db59418a810..0ff9b5f48c0 100644
--- a/code/modules/mod/modules/modules.dm
+++ b/code/modules/mod/modules/modules.dm
@@ -513,6 +513,8 @@
 	range = 10
 	hitsound = 'sound/weapons/batonextend.ogg'
 	hitsound_wall = 'sound/weapons/batonextend.ogg'
+	suppressed = SUPPRESSED_VERY
+	hit_threshhold = LATTICE_LAYER
 	var/line
 
 /obj/projectile/tether/fire(setAngle)
@@ -1061,6 +1063,11 @@
 		playsound(src, 'sound/mecha/hydraulic.ogg', 25, TRUE)
 		drain_power(use_power_cost)
 
+/obj/item/mod/module/clamp/on_uninstall()
+	for(var/atom/movable/crate as anything in stored_crates)
+		crate.forceMove(drop_location())
+		stored_crates -= crate
+
 /obj/item/mod/module/bikehorn
 	name = "MOD bike horn module"
 	desc = "A shoulder-mounted piece of heavy sonic artillery, this module uses the finest femto-manipulator technology to \
@@ -1163,7 +1170,7 @@
 	if(!.)
 		return
 	for(var/obj/item/ore as anything in ores)
-		ore.forceMove(mod.drop_location())
+		ore.forceMove(drop_location())
 		ores -= ore
 	drain_power(use_power_cost)
 
diff --git a/code/modules/projectiles/projectile.dm b/code/modules/projectiles/projectile.dm
index 1d4264c9b13..a28b3c47520 100644
--- a/code/modules/projectiles/projectile.dm
+++ b/code/modules/projectiles/projectile.dm
@@ -68,6 +68,9 @@
 	/// number of times we've pierced something. Incremented BEFORE bullet_act and on_hit proc!
 	var/pierces = 0
 
+	/// If objects are below this layer, we pass through them
+	var/hit_threshhold = PROJECTILE_HIT_THRESHHOLD_LAYER
+
 	var/speed = 0.8 //Amount of deciseconds it takes for projectile to travel
 	var/Angle = 0
 	var/original_angle = 0 //Angle at firing
@@ -495,7 +498,7 @@
 	if(!isliving(target))
 		if(isturf(target)) // non dense turfs
 			return FALSE
-		if(target.layer < PROJECTILE_HIT_THRESHHOLD_LAYER)
+		if(target.layer < hit_threshhold)
 			return FALSE
 		else if(!direct_target) // non dense objects do not get hit unless specifically clicked
 			return FALSE
diff --git a/code/modules/research/designs/mechfabricator_designs.dm b/code/modules/research/designs/mechfabricator_designs.dm
index babd4407d2f..99e9d8fc280 100644
--- a/code/modules/research/designs/mechfabricator_designs.dm
+++ b/code/modules/research/designs/mechfabricator_designs.dm
@@ -1093,6 +1093,7 @@
 	materials = list(/datum/material/iron = 1000, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module
 	category = list("MOD Modules")
+	var/department_type = MODULE_GENERAL
 
 /datum/design/module/New()
 	. = ..()
@@ -1110,24 +1111,28 @@
 	id = "mod_visor_medhud"
 	materials = list(/datum/material/silver = 500, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/visor/medhud
+	department_type = MODULE_MEDICAL
 
 /datum/design/module/mod_visor_diaghud
 	name = "MOD Module: Diagnostic Visor"
 	id = "mod_visor_diaghud"
 	materials = list(/datum/material/gold = 500, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/visor/diaghud
+	department_type = MODULE_SCIENCE
 
 /datum/design/module/mod_visor_sechud
 	name = "MOD Module: Security Visor"
 	id = "mod_visor_sechud"
 	materials = list(/datum/material/titanium = 500, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/visor/sechud
+	department_type = MODULE_SECURITY
 
 /datum/design/module/mod_visor_meson
 	name = "MOD Module: Meson Visor"
 	id = "mod_visor_meson"
 	materials = list(/datum/material/uranium = 500, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/visor/meson
+	department_type = MODULE_SUPPLY
 
 /datum/design/module/mod_visor_welding
 	name = "MOD Module: Welding Protection"
@@ -1140,18 +1145,21 @@
 	id = "mod_t_ray"
 	materials = list(/datum/material/iron = 500, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/t_ray
+	department_type = MODULE_ENGINEERING
 
 /datum/design/module/mod_health_analyzer
 	name = "MOD Module: Health Analyzer"
 	id = "mod_health_analyzer"
 	materials = list(/datum/material/iron = 500, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/health_analyzer
+	department_type = MODULE_MEDICAL
 
 /datum/design/module/mod_stealth
 	name = "MOD Module: Cloak"
 	id = "mod_stealth"
 	materials = list(/datum/material/iron = 1000, /datum/material/bluespace = 500)
 	build_path = /obj/item/mod/module/stealth
+	department_type = MODULE_SECURITY
 
 /datum/design/module/mod_jetpack
 	name = "MOD Module: Ion Jetpack"
@@ -1164,18 +1172,21 @@
 	id = "mod_magboot"
 	materials = list(/datum/material/iron = 1000, /datum/material/gold = 500)
 	build_path = /obj/item/mod/module/magboot
+	department_type = MODULE_ENGINEERING
 
 /datum/design/module/mod_holster
 	name = "MOD Module: Holster"
 	id = "mod_holster"
 	materials = list(/datum/material/iron = 1500, /datum/material/glass = 500)
 	build_path = /obj/item/mod/module/holster
+	department_type = MODULE_SECURITY
 
 /datum/design/module/mod_tether
 	name = "MOD Module: Emergency Tether"
 	id = "mod_tether"
 	materials = list(/datum/material/iron = 1000, /datum/material/silver = 500)
 	build_path = /obj/item/mod/module/tether
+	department_type = MODULE_ENGINEERING
 
 /datum/design/module/mod_mouthhole
 	name = "MOD Module: Eating Apparatus"
@@ -1188,6 +1199,7 @@
 	id = "mod_rad_protection"
 	materials = list(/datum/material/iron = 1000, /datum/material/uranium = 1000)
 	build_path = /obj/item/mod/module/rad_protection
+	department_type = MODULE_ENGINEERING
 
 /datum/design/module/mod_emp_shield
 	name = "MOD Module: EMP Shield"
@@ -1206,24 +1218,28 @@
 	id = "mod_reagent_scanner"
 	materials = list(/datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/reagent_scanner
+	department_type = MODULE_MEDICAL
 
 /datum/design/module/mod_gps
 	name = "MOD Module: Internal GPS"
 	id = "mod_gps"
 	materials = list(/datum/material/iron = 500, /datum/material/glass = 500)
 	build_path = /obj/item/mod/module/gps
+	department_type = MODULE_SUPPLY
 
 /datum/design/module/mod_constructor
 	name = "MOD Module: Constructor"
 	id = "mod_constructor"
 	materials = list(/datum/material/iron = 1000, /datum/material/titanium = 500)
 	build_path = /obj/item/mod/module/constructor
+	department_type = MODULE_ENGINEERING
 
 /datum/design/module/mod_quick_carry
 	name = "MOD Module: Quick Carry"
 	id = "mod_quick_carry"
 	materials = list(/datum/material/iron = 1000, /datum/material/titanium = 500)
 	build_path = /obj/item/mod/module/quick_carry
+	department_type = MODULE_MEDICAL
 
 /datum/design/module/mod_longfall
 	name = "MOD Module: Longfall"
@@ -1242,42 +1258,49 @@
 	id = "mod_injector"
 	materials = list(/datum/material/iron = 1000, /datum/material/diamond = 500)
 	build_path = /obj/item/mod/module/injector
+	department_type = MODULE_MEDICAL
 
 /datum/design/module/mod_microwave_beam
 	name = "MOD Module: Microwave Beam"
 	id = "mod_microwave_beam"
 	materials = list(/datum/material/iron = 1000, /datum/material/uranium = 500)
 	build_path = /obj/item/mod/module/microwave_beam
+	department_type = MODULE_SERVICE
 
 /datum/design/module/mod_bikehorn
 	name = "MOD Module: Bike Horn"
 	id = "mod_bikehorn"
 	materials = list(/datum/material/plastic = 500, /datum/material/iron = 500)
 	build_path = /obj/item/mod/module/bikehorn
+	department_type = MODULE_SERVICE
 
 /datum/design/module/mod_clamp
 	name = "MOD Module: Crate Clamp"
 	id = "mod_clamp"
 	materials = list(/datum/material/iron = 2000)
 	build_path = /obj/item/mod/module/clamp
+	department_type = MODULE_SUPPLY
 
 /datum/design/module/mod_drill
 	name = "MOD Module: Drill"
 	id = "mod_drill"
 	materials = list(/datum/material/silver = 1000, /datum/material/iron = 2000)
 	build_path = /obj/item/mod/module/drill
+	department_type = MODULE_SUPPLY
 
 /datum/design/module/mod_orebag
 	name = "MOD Module: Ore Bag"
 	id = "mod_orebag"
 	materials = list(/datum/material/iron = 1500)
 	build_path = /obj/item/mod/module/orebag
+	department_type = MODULE_SUPPLY
 
 /datum/design/module/mod_organ_thrower
 	name = "MOD Module: Organ Thrower"
 	id = "mod_organ_thrower"
 	materials = list(/datum/material/iron = 1000, /datum/material/glass = 1000)
 	build_path = /obj/item/mod/module/organ_thrower
+	department_type = MODULE_MEDICAL
 
 /datum/design/module/mod_pathfinder
 	name = "MOD Module: Pathfinder"
@@ -1296,6 +1319,7 @@
 	id = "mod_circuit"
 	materials = list(/datum/material/glass = 2000)
 	build_path = /obj/item/mod/module/circuit
+	department_type = MODULE_SCIENCE
 
 /datum/design/module/mod_plasma_stabilizer
 	name = "MOD Module: Plasma Stabilizer"
diff --git a/code/modules/research/techweb/all_nodes.dm b/code/modules/research/techweb/all_nodes.dm
index 9ce890c9399..4248ca44725 100644
--- a/code/modules/research/techweb/all_nodes.dm
+++ b/code/modules/research/techweb/all_nodes.dm
@@ -1451,8 +1451,6 @@
 	prereq_ids = list("robotics")
 	design_ids = list(
 		"mod_visor_diaghud",
-		"mod_stealth",
-		"mod_holster",
 		"mod_gps",
 		"mod_reagent_scanner",
 		"mod_clamp",
diff --git a/code/modules/ruins/spaceruin_code/oldstation.dm b/code/modules/ruins/spaceruin_code/oldstation.dm
index a3a6371ad75..3efca0798de 100644
--- a/code/modules/ruins/spaceruin_code/oldstation.dm
+++ b/code/modules/ruins/spaceruin_code/oldstation.dm
@@ -118,7 +118,7 @@
 	var/list/overlays = ..()
 	if(machine_stat & (NOPOWER|BROKEN))
 		return overlays
-	overlays += busy ? "red" : "green"
+	overlays += (busy || !mod_unit) ? "red" : "green"
 	return overlays
 
 /obj/machinery/mod_installer/proc/start_process()
@@ -144,9 +144,13 @@
 	human_occupant.update_action_buttons(TRUE)
 	playsound(src, 'sound/machines/ping.ogg', 30, FALSE)
 	if(!human_occupant.dropItemToGround(human_occupant.wear_suit) || !human_occupant.dropItemToGround(human_occupant.head))
-		open_machine()
+		finish_completion()
 		return
 	mod_unit.quick_activation()
+	finish_completion()
+
+/obj/machinery/mod_installer/proc/finish_completion()
+	mod_unit = null
 	open_machine()
 
 /obj/machinery/mod_installer/open_machine()
diff --git a/code/modules/vehicles/mecha/mech_fabricator.dm b/code/modules/vehicles/mecha/mech_fabricator.dm
index 6d74c2dde8c..f3eca75411f 100644
--- a/code/modules/vehicles/mecha/mech_fabricator.dm
+++ b/code/modules/vehicles/mecha/mech_fabricator.dm
@@ -42,10 +42,10 @@
 
 	/// Reference to a remote material inventory, such as an ore silo.
 	var/datum/component/remote_materials/rmat
-	
+
 	/// A list of part sets used for TGUI static data. Updated on Init() and syncing with the R&D console.
 	var/list/final_sets = list()
-	
+
 	/// A list of individual parts used for TGUI static data. Updated on Init() and syncing with the R&D console.
 	var/list/buildable_parts = list()
 
@@ -176,6 +176,9 @@
 		else if(ispath(built_item, /obj/item/borg_restart_board))
 			sub_category += "All Cyborgs" //Otherwise the restart board shows in the "parts" category, which seems dumb
 
+		else if(istype(D, /datum/design/module))
+			var/datum/design/module/module_design = D
+			sub_category = list(module_design.department_type)
 
 	var/list/part = list(
 		"name" = D.name,
diff --git a/icons/hud/radial.dmi b/icons/hud/radial.dmi
index 1ddd75a137c..35311aa29e6 100644
Binary files a/icons/hud/radial.dmi and b/icons/hud/radial.dmi differ
diff --git a/icons/mob/inhands/items_lefthand.dmi b/icons/mob/inhands/items_lefthand.dmi
index a96d0deedb5..9f1e81d550e 100644
Binary files a/icons/mob/inhands/items_lefthand.dmi and b/icons/mob/inhands/items_lefthand.dmi differ
diff --git a/icons/mob/inhands/items_righthand.dmi b/icons/mob/inhands/items_righthand.dmi
index 4d5b242cd21..d1343f77000 100644
Binary files a/icons/mob/inhands/items_righthand.dmi and b/icons/mob/inhands/items_righthand.dmi differ
diff --git a/icons/mob/mod.dmi b/icons/mob/mod.dmi
index c8083addffa..3781faaf80b 100644
Binary files a/icons/mob/mod.dmi and b/icons/mob/mod.dmi differ
diff --git a/icons/obj/aicards.dmi b/icons/obj/aicards.dmi
index 87c296980bb..892a0adb672 100644
Binary files a/icons/obj/aicards.dmi and b/icons/obj/aicards.dmi differ
diff --git a/icons/obj/mod.dmi b/icons/obj/mod.dmi
index 003fb23cf60..652543ec4b7 100644
Binary files a/icons/obj/mod.dmi and b/icons/obj/mod.dmi differ