Actually, I forgot to mention that I did adjust the y belt tension to match each other. I realized that’s one component that I’m not totally clear on. I re watched your belt assembly video Redirecting…. It would be great if you could add a small video showing more specifically what the tension should look and sound like. Or, even better, a way to measure it. I just read another forum topic “guitar tuning” that makes me think mine may be too tight. I try to match the y tension by listening for the same note when “strumming”. This note would be different based on where the x carriage is and whether it’s a 500 or 1000 rail. I guessed wrong on guitar tuning - #9 by GemelEButler