I feel like this might be obvious for most people, but I'm not sure...I built a reactor similar to DJ88's square design, and like most on that thread suggested, I am using 1/4" acrylic for the flange and 1/8" Neoprene for the gasket to seal the top off. My question is...do I cut it like a "square O-ring" and put the screws on the outside of the gasket, or do I cut the gasket to fit the whole flange then put holes through it so the screws actually go through both parts of the flange and the gasket in between. I feel like tightening the screws directly throught the gasket would mean they can't be tightened as much, but if they are on the outside, the allowed level of tightening would bend and possibly stress the acrylic. What works best? Thanks!