I just got thru rebuilding the spindle drive unit. I redid the PCB and replaced all transistors, diodes, and caps......replaced the transistor pack and reassembled the drive.....every thing works (fingers crossed on tomorrow morning)

I had the spindle on for over 2-hours running parts today and it seems fine....I cannot thank you guys enough here on the website....for all your comments and help......I learned so much rebuilding the board...very grateful to all of you guys.