I rebuilt a zapper and gave it to my friend,Stumpy Bill who had an ulcer on his only leg which had to be dressed 3 times a week, He used and after about 10 days they told him the bandage could come off and replaced with a stocking.His leg used to get bloody at the top of the bandage where he scratched it but that has all cleared up with only a couple of small sores. A couple of other things happened where his left hand straightened out and he can make a fist also which was impossible. He had the shakes as well which stopped him writing and now can do it quite legibly.He gets severe pain in his stump which came off in an MC accident so we are hoping that will ease a bit for him