I just recently completed my 1st attempt in making grips:
I'm also an experienced woodworker, and I found that the main skill that carried over was wood finishing, and the ability to use the tools, all else was a learning experience.
The way I went about it was to completely drive out the locating roll pin from the grip frame.
Then after determining the corner of each blank that I wanted to use to butt up against the edge of the grip and cylinder frames, I made sure it measured absolutely square, I made the relief cut for the angled ears and positioned the blank onto the grip frame, clamped it in place with an Irwin non marring composite spring clamp.
I used the locating pin hole in the grip frame as a drill bit guide to drill the locating hole on the backside of the blank with my drill press. Then I did the same thing for the opposite side blank.
I reinstalled the locating pin in the grip frame, mounted each grip blank one at a time and traced the frame outline on the back of the blanks and rough cut them to shape on a bandsaw, leaving extra for shaping.
I removed the grip frame, wrapped it with a layer of masking tape, mounted both blanks with double sided tape and went to town with my Jet spindle sander and did about 90% of the shaping, followed with wood files and sandpaper.
The finish is Birchwood Casey Tru-Oil. The wood is figured Claro Walnut I bought from www.woodworkerssource.com.