Yeah there’s a lot of sag on the Form 3L tanks. I have the same sag here, on both my good ones and the ones I RMA’d due to print issues. Only time it bugs me is if I want to rest the tank on a surface… with resin in it sags below the feet. I’ve been trying not to do that, or to use the carton it came in.
It’s funny, I actually found it easier to clean out all the resin from a 3L tank than the Form 3 ones. I like that it’s a simpler design with less nooks and crannies on the inside where resin can get stuck. The spout on one end is a winner. I did get some messy overflow the first time I did it… I think the trick is to go slowly. I thought about building an adjustable angle bracket to hold it in the right orientation so I don’t have to.
Is that Tough 2000 you’re printing in? I’d be happy to run a print for you and courier it down if you want to compare.
I’m not sure I’ve noticed the film deformation you’re seeing - I’ll have to take a closer look next time it’s open. I do recall a bit of waviness along the edges.