Jim has many skills that I do not have, and I have hired him to do a couple of small projects. But in the interest of bouncing ideas around, were it my project I would have done some different things in the grip area. First, I would have put more curve in the upward surface of the grip. Second, the bottom surface of the grip could be a more continuous curve from the rear screw to the grip cap. To my eye, this one has a "kink"--a sharply radiused part and then it gets straighter close to the end of the grip. And I would make the "bridge" between the flutes the nose of the comb thinner.

But, again, I offer these comments out of respect for Jim and readily acknowledge that most anything I can do, he can do better.