Hello everyone. I am starting my first build with an 125gal horizontal tank. Actually the tank tag says 124gal. Anyways I did some searching and I cant find any information on door cutting position. Should the top of the door cut be cut at center or below center of the tank? And if the top of the door cut should be below center, then how far below? Inches? Also should the bottom of the door cut be lined up with the tank center or below it? And again if below, how far? Please any advice would be appreciated. The valves have been removed and the tank is now going through its first inner soak.