ELEGOO fep sheet helper

The elegoo company recommends that you use a 80x80x5 piece to correctly calibrate the tightness of the fep sheet, so that resin prints dont stick to it fully and rip the sheet itself. I did add rounded corners due to my fear of pressing too hard and ripping the fep sheet. I haven't had the chance to print this and test it out yet since I just replaced the fep sheet in my resin printer earlier. So if you have any issues please comment and I will try and do my best to correct the issue.