Frame Connectors - install question

Remember years ago, the lexus commercial with the car on a gimbal being rotated and the marble running around all the even panel gaps as they rotated the car? This one I am working on the factory gaps are effing crazy different everywhere. This cars gaps in places would have swallowed that damn marble lol. Some spots I am not going to have a choice but to make it fit. Doors have great gaps all around except for the center back edge. Top back edge is great. It's like the quarter skins are too far back in the middle. I am going to hang new skins, so I plan on tapping the jamb edge forward to meet the door better in this spot before I weld on the new skins.