Used the long weekend to finalize the project.

Based on the Prototype 2 experience, the thumb board 3 had been moved 11 mm away from the finger boards and 2 mm higher. The finger boards 1 and 2 changed angles from 40 to 36 degrees. The CNC files are published.

Modified base:

Boards installed:

And everything eventually comes together! Note two silicone mousepads used as hand rests.

I am comfortably reaching 25-30 WPM continuous, with up to 50 on a 1-minute test. This is a 50 % improvement over my standard QWERTY four-finger input. Most important, in many years of computer use I am typing totally touch-type, without looking down at the keys.