Reflections:
Wood, though harder to cut, is quite conducive for shaping forms, both organic and hard.
One of the main takeaways is on paper, designing an ergonomic grip can be quite idealistic. When trying to sculpt a shape that feels great in your hand, it is quite a different matter all together and I feel that it probably takes more just one try to get it right.
Here I can see the strengths of a physical model. It can inform the designer the pitfalls that are simply hard to see when everything is just a concept on paper.
Also, precise curves are hard to imagine and draw coherently without going back and forth with a physical model. That said, I must admit that I did adjust the drawing design of the handle after completing the wood sculpt.