Hello Everyone, I'm new to this community and to CNC electronics. I own an old 5x9 Multicam 3000 router which I bought from a guy who went out of business. it came with a Bob Campbell's Design control box that looks well built. My issue is that when I turn on mach3 and hit the reset button the spindle(router) will start making jerky moves and would not respond to the mach3 commands. I had a guy come out to fix it and he told me it was a problem with the 5v power supply that powers the ESS. we ended up changing the supply and the problem was fixed. a month later the problem came back and now the tech said that is probably something else not related to what he did. my questions are? Have you ever seen this? Should I change the ESS card or the Breakout Board card? Should I upgrade the whole box? is the new Black box an alternative to me? Please, if you have a minute to give me some advise I would really appreciate it. Thanks, Will C.