Well scrap wood is my friend. I figured if I just drew a line on the back of the neck, and didn't plane on the line, I just might end up with an asymmetrical neck. In this case, a progressive, asymmetrical neck. The 'hump' is on the bass side at the tuner end of the neck, and moves over to the treble side as it approaches the body. This makes sense considering how I play the bass. It wasn't so complicated, I just went at it with the plane. I also tried the draw knife, supposedly the best tool for this. But the plane was much better. The blade angle on the draw knife seems suspiciously steep for generous wood removal, maybe I got the wrong kind. So the experiment on the 2x4 was a success. Now I will try it on my precious bamboo. Note in the image, that in my test, I carved the neck profile opposite of what I wanted, I will triple check that before I start on the real one.
