The belts we use are reinforced, and one side of mine is worse than the other. It is the side we walk by, and it always gets hit and stretched and plucked like a guitar. I might have broken some of the fibers in it. Maybe I should just replace it and see if that helps. Lower accelerations would really help.
The ones I have are as fast as I am comfortable with that still give half decent 3D printing quality….for the MPCNC. So maybe I should lower them an make a separate Lowrider firmware again.