Yea he does offer great customer service will actually talk to u any time you have any problems. He made me a custom powersupply that runs off a recharable wellchair battery-runs them so smooth.You dial in with a coarse and fine reostat. and also a breakout box for my mastech powersupply that lets me plug in 2 machines via rca and a has a superfine reostat on the shading slection.
If u would like to see pics just ask and i will take some