diff --git a/code/game/objects/items/handcuffs.dm b/code/game/objects/items/handcuffs.dm
index ee25cbb985..ea7d57255f 100644
--- a/code/game/objects/items/handcuffs.dm
+++ b/code/game/objects/items/handcuffs.dm
@@ -283,6 +283,7 @@
 					if(!C.legcuffed && C.get_num_legs(FALSE) >= 2) //beartrap can't cuff your leg if there's already a beartrap or legcuffs, or you don't have two legs.
 						C.legcuffed = src
 						forceMove(C)
+						C.update_equipment_speed_mods()
 						C.update_inv_legcuffed()
 						SSblackbox.record_feedback("tally", "handcuffs", 1, type)
 			else if(isanimal(L))
diff --git a/code/game/objects/items/storage/boxes.dm b/code/game/objects/items/storage/boxes.dm
index 01a4f03108..489704dbd5 100644
--- a/code/game/objects/items/storage/boxes.dm
+++ b/code/game/objects/items/storage/boxes.dm
@@ -1333,7 +1333,7 @@
 		/obj/item/storage/box/beakers/bluespace=1,\
 		/obj/item/storage/box/beakers/variety=1,\
 		/obj/item/storage/box/material=1,\
-		/obj/item/storage/belt/medical/surgery_belt_adv
+		/obj/item/storage/belt/medical/surgery_belt_adv=1
 		)
 	generate_items_inside(items_inside, src)
 
diff --git a/code/modules/antagonists/bloodsucker/powers/lunge.dm b/code/modules/antagonists/bloodsucker/powers/lunge.dm
index cc9363bbaf..f6dfc8ba72 100644
--- a/code/modules/antagonists/bloodsucker/powers/lunge.dm
+++ b/code/modules/antagonists/bloodsucker/powers/lunge.dm
@@ -59,7 +59,7 @@
 	var/do_knockdown = !is_A_facing_B(target,owner) || owner.alpha <= 0 || istype(owner.loc, /obj/structure/closet)
 	// CAUSES: Target has their back to me, I'm invisible, or I'm in a Closet
 	// Step One: Heatseek toward Target's Turf
-	addtimer(CALLBACK(owner, .proc/_walk, 0), 2 SECONDS)
+	addtimer(CALLBACK(GLOBAL_PROC, .proc/_walk, owner, 0), 2 SECONDS)
 	target.playsound_local(get_turf(owner), 'sound/bloodsucker/lunge_warn.ogg', 60, FALSE, pressure_affected = FALSE) // target-only telegraphing
 	owner.playsound_local(owner, 'sound/bloodsucker/lunge_warn.ogg', 60, FALSE, pressure_affected = FALSE) // audio feedback to the user
 	if(do_mob(owner, owner, 7, TRUE, TRUE))
diff --git a/code/modules/clothing/shoes/magboots.dm b/code/modules/clothing/shoes/magboots.dm
index 59747d59ba..b854ad8f9b 100644
--- a/code/modules/clothing/shoes/magboots.dm
+++ b/code/modules/clothing/shoes/magboots.dm
@@ -56,7 +56,10 @@
 /obj/item/clothing/shoes/magboots/advance/debug
 
 /obj/item/clothing/shoes/magboots/advance/debug/Initialize()
-	attack_self(src)
+	. = ..()
+	var/mob/living/L = loc
+	if(istype(L))
+		attack_self(L)
 
 /obj/item/clothing/shoes/magboots/paramedic
 	desc = "A pair of magboots decked in colors matching the equipment of an emergency medical technician."
diff --git a/code/modules/mob/living/carbon/carbon.dm b/code/modules/mob/living/carbon/carbon.dm
index ff2f894dab..32e3696bc5 100644
--- a/code/modules/mob/living/carbon/carbon.dm
+++ b/code/modules/mob/living/carbon/carbon.dm
@@ -412,16 +412,16 @@
 	else
 		if(I == handcuffed)
 			handcuffed.forceMove(drop_location())
-			handcuffed.dropped(src)
 			handcuffed = null
+			I.dropped(src)
 			if(buckled && buckled.buckle_requires_restraints)
 				buckled.unbuckle_mob(src)
 			update_handcuffed()
 			return
 		if(I == legcuffed)
 			legcuffed.forceMove(drop_location())
-			legcuffed.dropped()
 			legcuffed = null
+			I.dropped(src)
 			update_inv_legcuffed()
 			return
 		else
diff --git a/code/modules/mob/living/silicon/pai/pai.dm b/code/modules/mob/living/silicon/pai/pai.dm
index a65c1d24ac..26fa3b505d 100644
--- a/code/modules/mob/living/silicon/pai/pai.dm
+++ b/code/modules/mob/living/silicon/pai/pai.dm
@@ -12,7 +12,6 @@
 	layer = BELOW_MOB_LAYER
 	var/obj/item/instrument/piano_synth/internal_instrument
 	silicon_privileges = PRIVILEDGES_PAI
-	var/datum/element/mob_holder/current_mob_holder //because only a few of their chassis can be actually held.
 
 	var/network = "ss13"
 	var/obj/machinery/camera/current = null
@@ -142,6 +141,11 @@
 	ALM.Grant(src)
 	emitter_next_use = world.time + 10 SECONDS
 
+/mob/living/silicon/pai/ComponentInitialize()
+	. = ..()
+	if(possible_chassis[chassis])
+		AddElement(/datum/element/mob_holder, chassis, 'icons/mob/pai_item_head.dmi', 'icons/mob/pai_item_rh.dmi', 'icons/mob/pai_item_lh.dmi', ITEM_SLOT_HEAD)
+
 /mob/living/silicon/pai/Life()
 	if(hacking)
 		process_hack()
@@ -302,11 +306,11 @@
 /obj/item/paicard/attackby(obj/item/W, mob/user, params)
 	..()
 	user.set_machine(src)
-	if(pai.encryptmod == TRUE)
-		if(W.tool_behaviour == TOOL_SCREWDRIVER)
-			pai.radio.attackby(W, user, params)
-		else if(istype(W, /obj/item/encryptionkey))
-			pai.radio.attackby(W, user, params)
+	var/encryption_key_stuff = W.tool_behaviour == TOOL_SCREWDRIVER || istype(W, /obj/item/encryptionkey)
+	if(!encryption_key_stuff)
+		return
+	if(pai?.encryptmod)
+		pai.radio.attackby(W, user, params)
 	else
 		to_chat(user, "Encryption Key ports not configured.")
 
diff --git a/code/modules/mob/living/silicon/pai/pai_shell.dm b/code/modules/mob/living/silicon/pai/pai_shell.dm
index 7de983229e..c6710141f9 100644
--- a/code/modules/mob/living/silicon/pai/pai_shell.dm
+++ b/code/modules/mob/living/silicon/pai/pai_shell.dm
@@ -76,6 +76,7 @@
 	var/list/choices = list("Preset - Basic", "Preset - Dynamic")
 	if(CONFIG_GET(flag/pai_custom_holoforms))
 		choices += "Custom"
+	var/old_chassis = chassis
 	var/choicetype = input(src, "What type of chassis do you want to use?") as null|anything in choices
 	if(!choicetype)
 		return FALSE
@@ -95,10 +96,11 @@
 			dynamic_chassis = choice
 	resist_a_rest(FALSE, TRUE)
 	update_icon()
-	current_mob_holder?.Detach(src)
-	current_mob_holder = null
+	if(possible_chassis[old_chassis])
+		var/datum/element/mob_holder/M = SSdcs.GetElement(/datum/element/mob_holder, old_chassis, 'icons/mob/pai_item_head.dmi', 'icons/mob/pai_item_rh.dmi', 'icons/mob/pai_item_lh.dmi', ITEM_SLOT_HEAD)
+		M.Detach(src)
 	if(possible_chassis[chassis])
-		current_mob_holder = AddElement(/datum/element/mob_holder, chassis, 'icons/mob/pai_item_head.dmi', 'icons/mob/pai_item_rh.dmi', 'icons/mob/pai_item_lh.dmi', ITEM_SLOT_HEAD)
+		AddElement(/datum/element/mob_holder, chassis, 'icons/mob/pai_item_head.dmi', 'icons/mob/pai_item_rh.dmi', 'icons/mob/pai_item_lh.dmi', ITEM_SLOT_HEAD)
 	to_chat(src, "<span class='boldnotice'>You switch your holochassis projection composite to [chassis]</span>")
 
 /mob/living/silicon/pai/lay_down()
diff --git a/code/modules/vore/eating/living.dm b/code/modules/vore/eating/living.dm
index 5f280fb04d..2ab6a59c0a 100644
--- a/code/modules/vore/eating/living.dm
+++ b/code/modules/vore/eating/living.dm
@@ -158,7 +158,7 @@
 		swallow_time = istype(prey, /mob/living/carbon/human) ? belly.human_prey_swallow_time : belly.nonhuman_prey_swallow_time
 
 	//Timer and progress bar
-	if(!do_after(user, swallow_time, prey))
+	if(!do_after(user, swallow_time, TRUE, prey))
 		return FALSE // Prey escaped (or user disabled) before timer expired.
 
 	if(!prey.Adjacent(user)) //double check'd just in case they moved during the timer and the do_mob didn't fail for whatever reason