are you doing these for practice ? or are you going to engrave them at some point ? as a sketch- well i'll say i think they would be great engraved in metal.
Shawn looking very nice....I have not cut that "ball fence" on the back of a single action frame but imagine it presents some challenges keeping the graver tip at the optimal cutting angle on that quick curve surface. You have and done a fine job of it w even width "smooth" lines.
I have cut some ball shaped fences on shotgun actions and found there is a lot going on if you are used to working on flat surfaces.
Q: were you able to work that surface under a scope or did you use opti magnifiers for the primary cuts?