Hi Jonathan..

I am using 2 x nema 34 motors, they can go to 60v with 5.5amps.. The drivers are PM752 from Zapp, they can go to 70v but have been advised to keep it at around 60v..
I am a fair engineer, but am probably lethal with a 1.5v battery, so best keep me away from electronics unless you have shares in CPR kits..!
Was just looking at one of those articles on how to convert an atx pc power supply into 12v 8amp source.. Hmm.. If you see a purple flash on the southern horizon, then I probably had a go at this...!

Let me know if you have something that may suit..

Many thanks..
Steve.