Well, there’s a way to adjust the tension on the belts, and that’s what I would suggest trying next. Start with the belt underneath the laser arm and tighten it a little. The pulley on the right side slides in a slot…loosen it with a hex wrench and push it farther to the right if you can before tightening it up.
The belts on the side have the sliding pulleys at the rear.
Do all of this with the machine off. The instructions are laid out here: