Cleanbot now drops correct arm

code/modules/mob/living/simple_animal/bot/bot.dm

@@ -63,6 +63,7 @@
 	var/new_destination		// pending new destination (waiting for beacon response)
 	var/destination			// destination description tag
 	var/next_destination	// the next destination in the patrol route
+	var/robot_arm = /obj/item/robot_parts/r_arm
 
 	var/blockcount = 0		//number of times retried a blocked path
 	var/awaiting_beacon	= 0	// count of pticks awaiting a beacon response
@@ -1106,3 +1107,7 @@ Pass a positive integer as an argument to override a bot's default speed.
 	if(I)
 		I.icon = null
 	path.Cut(1, 2)
+
+/mob/living/simple_animal/bot/proc/drop_part(obj/item/drop_item, dropzone)
+	new drop_item(dropzone)
+	drop_item = null

code/modules/mob/living/simple_animal/bot/cleanbot.dm

@@ -179,14 +179,10 @@
 	on = 0
 	visible_message("<span class='userdanger'>[src] blows apart!</span>")
 	var/turf/Tsec = get_turf(src)
-
 	new /obj/item/reagent_containers/glass/bucket(Tsec)
-
 	new /obj/item/assembly/prox_sensor(Tsec)
-
 	if(prob(50))
-		new /obj/item/robot_parts/l_arm(Tsec)
-
+		drop_part(robot_arm, Tsec)
 	do_sparks(3, 1, src)
 	..()
 

code/modules/mob/living/simple_animal/bot/construction.dm

@@ -22,6 +22,7 @@
 		var/turf/T = get_turf(loc)
 		var/mob/living/simple_animal/bot/cleanbot/A = new /mob/living/simple_animal/bot/cleanbot(T)
 		A.name = created_name
+		A.robot_arm = W.type
 		to_chat(user, "<span class='notice'>You add the robot arm to the bucket and sensor assembly. Beep boop!</span>")
 		user.unEquip(src, 1)
 		qdel(src)