So I can continue to use the old controller boards as well as the original motors that I bought? Great! I thought I'd have to change everything out. Really appreciate the prompt response.

If I upgrade to Phidgets 22, Will my old motors work with the new Vint Boards?

How about Max 7?

There is one stepper for each control board and there are 2 servos on the advanced servo board. What if I just install a fresh version of Max 5?

I built a museum exhibit in 2011 that used Max 5 which controlled 2 steppers and 1 advanced servo. I would like to upgrade to Max 8 but still use the existing program, motors and control modules. Are there any issues with Max 8? Thanks in advance.