Removes a bunch of sleeps/spawns and makes a few booleans defines

code/modules/power/antimatter/control.dm

@@ -260,17 +260,15 @@
 			if(AMS.processing)
 				AMS.shutdown_core()
 			AMS.control_unit = null
-			spawn(10)
-				AMS.controllerscan()
+			addtimer(CALLBACK(AMS, /obj/machinery/am_shielding.proc/controllerscan), 10)
 		linked_shielding = list()
-
 	else
 		for(var/obj/machinery/am_shielding/AMS in linked_shielding)
 			AMS.update_icon()
-	spawn(20)
-		shield_icon_delay = 0
-	return
+	addtimer(CALLBACK(src, .proc/reset_shield_icon_delay), 20)
 
+/obj/machinery/power/am_control_unit/proc/reset_shield_icon_delay()
+	shield_icon_delay = 0
 
 /obj/machinery/power/am_control_unit/proc/check_core_stability()
 	if(stored_core_stability_delay || linked_cores.len <= 0)
@@ -280,10 +278,10 @@
 	for(var/obj/machinery/am_shielding/AMS in linked_cores)
 		stored_core_stability += AMS.stability
 	stored_core_stability/=linked_cores.len
-	spawn(40)
-		stored_core_stability_delay = 0
-	return
+	addtimer(CALLBACK(src, .proc/reset_stored_core_stability_delay), 40)
 
+/obj/machinery/power/am_control_unit/proc/reset_stored_core_stability_delay()
+	stored_core_stability_delay = 0
 
 /obj/machinery/power/am_control_unit/interact(mob/user)
 	if((get_dist(src, user) > 1) || (stat & (BROKEN|NOPOWER)))