I choose the joints for this assignment to be some that will work for the pedal board project.
The first try I realize the CNC didn’t left a clean right angle (90 degrees) because of the circular bit, for that reason the joints didn’t fit perfect.
In order for them to fit, I drill a small whole and sand the curve parts.
I also try with fingertip tenons type of joint, having a good result.
I’m glad your skill builder joint was the one you intended on using in your CNC assignment. That was smart.