I have now used almost a square mile of plywood trying to cut an ornament. I DON’T WORK – never get through to the back side of plywood.
I use 2.0 mm plywood
Laser distance 2.4 mm
Debth 1.0 mm
I have cut the small box on 1.5 mm plywood – it worked fine – and I can’t see any difference in the set up.