I can't offer any help, but I do have a question.
I've been researching and looking at all the CNC information I can get my hands on. But it seems that the most elusive part of the equation is the electronics. I see pics of extremlely complex electonics setups involving transformers, huge capacitors, and toroids. I haven't been able to find out what this is for. Are they just home-brew power supply setups?