Field Cauterizer Tool
(It looks like a pen basically, just google Cauterizer, steam likes to block my links or else I'd give you one)
+30% Medical tend speed
-5% Tend Quality

Powered Bone Saw
+30% Butcher Speed

Ripper Bone Saw (Huge powered bone saw version that's more "brutal" looking)
+60% Butcher Speed
-10% Butcher Efficiency (I imagine it having a blade the size of the Power Saw)

very cool suggestions :) I am working on the nail gun at the moment

i'll jump in here as well :) cool to see you working on the nailgun, setosa!

anyways, the bone saws could provide +n% to surgery speed (maybe at the cost of success chance, or not, who knows)

What about a portable laser engraver or something like that? Adds either a flat upgrade to the quality of created items/art, or increases the likelihood of getting a better quality item/art