Hi, folks. Am looking for educational materials on how to use hand files for particular metal-shaping jobs in gunsmithing the old-school way. To narrow it down, I’m looking for what probably is going to be old references, which will likely be in book form, showing how gun artisans used hand files to shape receivers, hammers, etc. I know Rika probably has a comparatively extensive reference library, so maybe she can steer me toward what I'm looking for? Anyone else? Any leads would be most appreciated.