The sculpfun S30 series has the air pump connected to the control board so that lightburn can tell it to turn off and on based on the layer setting. So you can have it automatically turn on during a cut operation but shut off for an engrave if needed. I’ll show that in more detail when I post the full machine review.
I was going for simple with these. But I have made them in the past where I drop them into the CNC router to pocket out for the magnets to be flush with the back. You just have to make sure they don’t end up too strong without a way to grip behind the piece to move it.