Naw, purchase the tool then ask for advice on how to use it, like everyone else!
"Violin maker's plane" can cover a lot of ground, can you post a picture? Generally speaking, the planes used by violin makers are like a lot of special-purpose tools, they do one thing well. The key to adapting one to use in gunbuilding is going to be to figure out how the special-purpose tool was used, and what similar operations there are in gunstocking.