Hi
I keep stages in case I need to revert. As you will see I never keep all the lines (although I probably should). What I did a lot was use filet and variable filet. I started with the grips first and then the frame. I had to remake the frame after I mirrored it when having difficulty filleting one side and later discovered the gun is not symmetrical. I also foolishly did nit see that that profile of the rear of the slide has to match the upper rear part of the frame. I also found it hard to juge the depth of the frame at various points from the front.

I attach the only early version that has construction lines. Good luck.

Keith