Deconflict

code/modules/projectiles/guns/energy/kinetic_accelerator.dm

@@ -79,7 +79,7 @@
 	holds_charge = TRUE
 	unique_frequency = TRUE
 
-/obj/item/gun/energy/kinetic_accelerator/New()
+/obj/item/gun/energy/kinetic_accelerator/Initialize(mapload)
 	. = ..()
 	if(!holds_charge)
 		empty()
@@ -98,8 +98,7 @@
 	if(!QDELING(src) && !holds_charge)
 		// Put it on a delay because moving item from slot to hand
 		// calls dropped().
-		spawn(2)
-			empty_if_not_held()
+		addtimer(CALLBACK(src, .proc/empty_if_not_held), 2)
 
 /obj/item/gun/energy/kinetic_accelerator/proc/empty_if_not_held()
 	if(!ismob(loc))
@@ -143,17 +142,17 @@
 	overheat = FALSE
 
 /obj/item/gun/energy/kinetic_accelerator/update_icon()
-	overlays.Cut()
+	cut_overlays()
 	if(empty_state && !can_shoot())
-		overlays += empty_state
+		add_overlay(empty_state)
 
 	if(gun_light && can_flashlight)
 		var/iconF = "flight"
 		if(gun_light.on)
 			iconF = "flight_on"
-		overlays += image(icon = icon, icon_state = iconF, pixel_x = flight_x_offset, pixel_y = flight_y_offset)
+		add_overlay(image(icon = icon, icon_state = iconF, pixel_x = flight_x_offset, pixel_y = flight_y_offset))
 	if(bayonet && can_bayonet)
-		overlays += knife_overlay
+		add_overlay(knife_overlay)
 
 
 /obj/item/gun/energy/kinetic_accelerator/experimental

code/modules/projectiles/guns/energy/special.dm

@@ -165,12 +165,18 @@
 
 /obj/item/gun/energy/plasmacutter/attackby(obj/item/A, mob/user)
 	if(istype(A, /obj/item/stack/sheet/mineral/plasma))
+		if(power_supply.charge >= power_supply.maxcharge)
+			to_chat(user,"<span class='notice'>[src] is already fully charged.")
+			return
 		var/obj/item/stack/sheet/S = A
 		S.use(1)
 		power_supply.give(1000)
 		on_recharge()
 		to_chat(user, "<span class='notice'>You insert [A] in [src], recharging it.</span>")
 	else if(istype(A, /obj/item/stack/ore/plasma))
+		if(power_supply.charge >= power_supply.maxcharge)
+			to_chat(user,"<span class='notice'>[src] is already fully charged.")
+			return
 		var/obj/item/stack/ore/S = A
 		S.use(1)
 		power_supply.give(500)

code/modules/projectiles/projectile.dm

@@ -10,7 +10,6 @@
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	hitsound = 'sound/weapons/pierce.ogg'
 	var/hitsound_wall = ""
-	pressure_resistance = INFINITY
 	burn_state = LAVA_PROOF
 	var/def_zone = ""	//Aiming at
 	var/mob/firer = null//Who shot it
@@ -98,7 +97,7 @@
 		var/turf/simulated/wall/W = target_loca
 		if(impact_effect_type)
 			new impact_effect_type(target_loca, hitx, hity)
-		
+
 		W.add_dent(WALL_DENT_SHOT, hitx, hity)
 		return 0
 	if(alwayslog)
@@ -334,3 +333,6 @@ obj/item/projectile/Crossed(atom/movable/AM, oldloc) //A mob moving on a tile wi
 /obj/item/projectile/proc/setAngle(new_angle)	//wrapper for overrides.
 	Angle = new_angle
 	return TRUE
+
+/obj/item/projectile/experience_pressure_difference()
+	return