I know tools can increase things like mining speed. They don't change the mining skill stat. It just adds a modifier. So I'm sure you could make it so a body part has that same modifier tag.
You could probably take the right tool for the job mod and look at its code for its drill and take a look at the Hediffs defs in either the core folder or a mod that adds body parts. I bet you could combine it in a way to get you what you want.
You could probably take the right tool for the job mod and look at its code for its drill and take a look at the Hediffs defs in either the core folder or a mod that adds body parts. I bet you could combine it in a way to get you what you want.