tdixon1000,
What a amazing job you did!!!
Yes, I realized the FEP film became bulge when it print large surface. Locating glass under the film is great idea.
Especially it happens when first layers are printed. It is causing weak cure of attaching layers. I failed couple of times from this issue.
I set 15 sec delay for printing first attaching supports to allow trapped resin escape and way-over-cured fist 15 layers and that resolved the issue.
For rest of the layers, I set 1.5 sec delay before project light.
I don’t print large surface area, but it potentially has this issue all the time.
I have some polycarbonate left. I will cut the panel and try to place under the film.
ILHYOUNG.