Hi so I've been lurking on the site for awhile and was a bit confused about my own build. I went to the calculator site and put my stuff in but the thing is I'm not sure if the opening between the fb and the cc are correct as the tank is short and squat. It is a propane tank and the dimentions are 27 inches between the welds on the end caps and its 8ft on the diameter. The calculator says it should be 14.07 inches at the top of the half moon. Is that gonna work for this sized tank or should I make it bigger. Any kind of help would be appreciated. I want to get the dimentions for the cut down before I start with the cutting away. Thanks