See that unevenness on x and y.

See that unevenness on x and y. I would have thought that was stack belts, but they seem pretty tight. PLA. This is a moving bed (x) printer.

I think you’re overextruding, try lowering your extrusion multiplier and reprint :slight_smile:

Additionally, your belts could be tight as a drum, but the set screws on your pulleys could be allowing them to twist occasionally. The top of that definitely looks like you’re overextruding a little too.