It’s actually much easier to focus on one issue at a time, but in your case, several of your issues are being caused by that loose belt. You need to tighten the tension on the saggy belt and it’s fairly easy…
You will need a hex wrench.
- Turn the machine off.
- Gently move the laser arm forward.
- Loosen the round black pulley at the back that the belt loops over with the hex wrench.
- Slide it back towards the rear of the machine in the slot that it moves in.
- Tighten the pulley and check to make sure that the tension in the belt matches the tension in the belt on the other side. There’s a video here showing the correct tension:
That should take care of most of the problems. For cutting through the draftboard, make sure it is pinned down flat on the tray and if needed, you can slow the cut down by about 5 points or so.