You are way ahead of me there. I am comfortable around 440v 3phase electricity but electronics are not my strength. Just knowing that the spindle is 100vdc puts me ahead of where I was. I have a 12vdc and 24 vdc power supply so that just leaves me with the PWM board. Even a diagram that you may have scribbled on a napkin would be a help.

Thanks for all the time you have put into this project. I actually got mine out this past weekend and put it up on the bench again and started taking the covers off so I could compare it to the pictures you have posted.