There seem to be alot of sellers listing the MA860H drivers such as below:

CNC Kit CNC Breakout Board +Cables+ 3 Axis MA860H Stepper Driver Controller 7.2A | eBay

How would you rate these compared to the DQ860MA mentioned in post #2?

I know you like to make you own linear supplies, but I would prefer to go for another ready made switched mode such as:
CNC Power Supply 350W 60V 6A For CNC Stepper Motor Driver MA860H M542H NEMA34 | eBay
Any views on that one?

Thanks for your help.