diff --git a/code/game/objects/items/devices/powersink.dm b/code/game/objects/items/devices/powersink.dm
index e319a26bfe1..04d0358c9f5 100644
--- a/code/game/objects/items/devices/powersink.dm
+++ b/code/game/objects/items/devices/powersink.dm
@@ -23,6 +23,7 @@
 	var/mode = 0		// 0 = off, 1=clamped (off), 2=operating
 	var/admins_warned = FALSE // stop spam, only warn the admins once that we are about to boom
 	var/obj/structure/cable/attached		// the attached cable
+	new_attack_chain = TRUE
 
 /obj/item/powersink/Destroy()
 	STOP_PROCESSING(SSobj, src)
diff --git a/code/game/objects/items/devices/scanners.dm b/code/game/objects/items/devices/scanners.dm
index 3f465ba9344..dbdd778a2c8 100644
--- a/code/game/objects/items/devices/scanners.dm
+++ b/code/game/objects/items/devices/scanners.dm
@@ -20,6 +20,7 @@ SLIME SCANNER
 	materials = list(MAT_METAL = 300)
 	origin_tech = "magnets=1;engineering=1"
 	var/on = FALSE
+	new_attack_chain = TRUE
 
 /obj/item/t_scanner/Destroy()
 	if(on)
@@ -34,8 +35,12 @@ SLIME SCANNER
 	else
 		STOP_PROCESSING(SSobj, src)
 
-/obj/item/t_scanner/attack_self__legacy__attackchain(mob/user)
+/obj/item/t_scanner/activate_self(mob/user)
+	if(..())
+		return ITEM_INTERACT_COMPLETE
 	toggle_on()
+	add_fingerprint(user)
+	return ITEM_INTERACT_COMPLETE
 
 /obj/item/t_scanner/process()
 	if(!on)
@@ -92,10 +97,12 @@ SLIME SCANNER
 /obj/item/reagent_scanner/interact_with_atom(atom/target, mob/living/user, list/modifiers)
 	. = ..()
 	do_scan(target, user)
+	return ITEM_INTERACT_COMPLETE
 
 /obj/item/reagent_scanner/ranged_interact_with_atom(atom/target, mob/living/user, list/modifiers)
 	. = ..()
 	do_scan(target, user)
+	return ITEM_INTERACT_COMPLETE
 
 /obj/item/reagent_scanner/proc/do_scan(atom/target, mob/living/user)
 	if(user.stat != CONSCIOUS)
@@ -104,6 +111,8 @@ SLIME SCANNER
 		to_chat(user, SPAN_WARNING("You don't have the dexterity to do this!"))
 		return
 
+	add_fingerprint(user)
+
 	if(!target.reagents)
 		to_chat(user, SPAN_NOTICE("No significant chemical agents found in [target]."))
 		return
@@ -170,15 +179,19 @@ SLIME SCANNER
 	w_class = WEIGHT_CLASS_SMALL
 	flags = CONDUCT
 	throw_speed = 3
-	materials = list(MAT_METAL=30, MAT_GLASS=20)
+	materials = list(MAT_METAL = 30, MAT_GLASS = 20)
+	new_attack_chain = TRUE
 
-/obj/item/slime_scanner/attack__legacy__attackchain(mob/living/M, mob/living/user)
+/obj/item/slime_scanner/interact_with_atom(atom/target, mob/living/user, list/modifiers)
 	if(user.incapacitated() || user.AmountBlinded())
-		return
-	if(!isslime(M))
+		return ..()
+	if(!isslime(target))
 		to_chat(user, SPAN_WARNING("This device can only scan slimes!"))
-		return
-	slime_scan(M, user)
+		return ITEM_INTERACT_COMPLETE
+
+	slime_scan(target, user)
+	add_fingerprint(user)
+	return ITEM_INTERACT_COMPLETE
 
 /proc/slime_scan(mob/living/simple_animal/slime/T, mob/living/user)
 	to_chat(user, "========================")
diff --git a/code/modules/mining/equipment/mining_charges.dm b/code/modules/mining/equipment/mining_charges.dm
index f2f20ef285d..fcdde6ea2cf 100644
--- a/code/modules/mining/equipment/mining_charges.dm
+++ b/code/modules/mining/equipment/mining_charges.dm
@@ -163,18 +163,18 @@
 	. = ..()
 	. += SPAN_NOTICE("This scanner has an extra port for overriding mining charge safeties.")
 
-/obj/item/t_scanner/adv_mining_scanner/syndicate/afterattack__legacy__attackchain(atom/target, mob/user, proximity_flag, click_parameters)
+/obj/item/t_scanner/adv_mining_scanner/syndicate/interact_with_atom(atom/target, mob/living/user, list/modifiers)
 	if(!istype(target, /obj/item/grenade/plastic/miningcharge))
-		return
+		return ..()
 
 	var/obj/item/grenade/plastic/miningcharge/charge = target
 	if(charge.hacked)
-		to_chat(user, SPAN_NOTICE("[src] is already overridden!"))
-		return
+		to_chat(user, SPAN_WARNING("[src] is already overridden!"))
+		return ITEM_INTERACT_COMPLETE
 
 	if(charges <= 0)
-		to_chat(user, SPAN_NOTICE("Its overriding function is depleted."))
-		return
+		to_chat(user, SPAN_WARNING("Its overriding function is depleted!"))
+		return ITEM_INTERACT_COMPLETE
 
 	charge.override_safety()
 	visible_message(SPAN_WARNING("Sparks fly out of [src]!"))
@@ -182,6 +182,8 @@
 	charges--
 	if(charges <= 0)
 		to_chat(user, SPAN_WARNING("[src]'s internal battery for overriding mining charges has run dry!"))
+	add_fingerprint(user)
+	return ITEM_INTERACT_COMPLETE
 
 // MINING CHARGES DETONATOR