Plz Help! Wavy line issue on new boss laser

[scobo]

Wondering if anyone has some troubleshooting ideas with this issue I am having. I will try and lay out my setup and what I have tried so far. If I am missing anything, please let me know so I can add it.

Setup:

Boss Laser HP 5598

Running lightburn

Tried cut speeds ranging from 10mm/s to 350mm/s, same result.

Tried reducing acceleration in X and Y from 2000 to 200mm/s2 and 3000 to 300mm/s2, same result.

Motion Parameter Settings image attached along with the issue in question.

Belt tension:

Both Y axis belts seem extremely tight. X axis belt seems looser compared to Y axis but still decently tight. - Wasn't going to try and tighten unless yall think that may be my problem?