Dirtytires wrote: ↑July 30th, 2018, 2:57 pmHow thick is the gasket and what kind?
It is usually easier to put the flanges on the door when it is cut-out and on the bench then just set it back on, line it up and weld the hinges. Since you went hinges first, I figure you need to shim between the door and the flange (as opposed to between the flange and the tank). Should work tho.