Thanks for the advice ,keep it coming. Are there and drivers which are ok? Do I need to design my own? The Duet sounds promising I do have one I can use. I still doubt it can drive the motors directly. 40v 4A seemed about right to me. Will try to check what is written on the motors.

Duet 3 boards have ariived and am stripping down the less complete machine. More details on duet forum.

The Duet and Raspberry pi4s have arrived so now the work starts.