Hi new guy ! I had that problem too. I took the door off and put it on sawhorses. Then,near as I remember,I bent the tabs and took out the moveable plate,welded the door inside and out. Grind it smooth with a 4" grinder(or whatever fits in the door) in and out,cut a piece of thin steel bigger than the cracked area inside and cut and grind for a good fit inside the door. The idea is to spread the suface area of contact. Weld that in,drill thru the old holes,thru new steel. Hang door by top hinge,hold moveable plate with one hand,install bottom bolts with the other,and adjust. Piece of cake! Good luck!