cleaned up brain transfer

code/game/objects/items/weapons/surgery_tools.dm

@@ -517,6 +517,12 @@ CIRCULAR SAW
 	if(user.zone_sel.selecting == "head" || istype(M, /mob/living/carbon/metroid))
 
 		var/mob/living/carbon/human/H = M
+
+		if(istype(H) && H.organs["head"])
+			var/datum/organ/external/affecting = H.organs["head"]
+			if(affecting.destroyed)
+				return ..()
+
 		if(istype(H) && ( \
 				(H.head && H.head.flags & HEADCOVERSEYES) || \
 				(H.wear_mask && H.wear_mask.flags & MASKCOVERSEYES) || \

code/modules/mob/organ/organ_external.dm

@@ -114,7 +114,8 @@ obj/item/weapon/organ/head/proc/transfer_identity(var/mob/living/carbon/human/H)
 	brainmob.name = H.real_name
 	brainmob.real_name = H.real_name
 	brainmob.dna = H.dna
-	brainmob.container = src
+	if(H.mind)
+		H.mind.transfer_to(brainmob)
 
 obj/item/weapon/organ/head/attackby(obj/item/weapon/W as obj, mob/user as mob)
 	if(istype(W,/obj/item/weapon/scalpel))