Picture of my reverse engineering...LOL

I originally intended to make a full female mold but liked the one off/strip method better for my application... so a change of course.

Since I already shaped the full sized plug I just took 3mm ply templates @ 12" on Center off of one side and then transferring them to 1/2" and 3/4" ply (using up whatever scraps I have which are suitable) for the actual female jig frames.