You’re 100% correct and I agree with you. And I probably asked the question in the wrong way.
The MPCNC is obviously a very capable design. Whatever the reason is, it’s 100% on me. I know my machine’s limitations (more or less). But with my troubled success, I found that I wanted a larger cut area anyway. So I could spend the time rebuilding a machine I’ve already had trouble with or build a new design. I chose the new design. I was going to sell the MPCNC, but my brother wants it. He can pick up where I left off, rebuild it, troubleshoot, etc. and I will help him where I can.
The original question simply came from the fact that the Einsy Rambo board is rarely mentioned anywhere on the forums or the documentation. Doesn’t seem like a lot of people use it. I’m still certain it’s a build issue, but I wondered if not having the Jackpot or a more familiar board was putting me at a disadvantage while trying to troubleshoot the real problem. If it was, I would upgrade it for my brother before I gave it to him. Or if the V3 Jackpot was some huge upgrade that I would be foolish to not put it in the LR4, then I would order it and still put the V1 in the MPCNC. But what I’m gathering from this thread is that neither of those things are the case and so it doesn’t make a ton of sense to buy a V3.
I am grateful for all the help on the forum. I just hit my limit with the MPCNC and decided my time was better spent trying to build a LR4 and end up with something closer to what I want. And I’m sure I’ll be on here with more questions once I finish the LR4.