ECM & EDM

Hi, I've been trying to build ECM(Electro Chemical Machining) and EDM(Electro Discharge Machining) machine using arduino but I didn't know what specifications of parts are required and how I should hook them up. Below links are the videos that inspired me. ECM : http://www.boingboing.net/2009/08/06/bb-video-carve-steel.html EDM : http://www.youtube.com/watch?v=uUN4_-xp1Wc&feature=fvwrel I hope I could build them both but I couldn't find any circuit diagram that I could make principle of. The reason why I am trying to build them is to machine materials like stainless steel and steel alloy like monel, inconel, hastelloy. I will make groove or through hole in those materials. Could you please advise me how should I approach this project?

My advice would be, after well over 300 posts, to not cross-post.