Pulling the door and putting it back...... hilarious experience -

You'd be amazed that 1/64" off adjustment at the hinge (in any direction) can throw the whole thing out of wack.

Two pals and I struggled all afternoon hanging a junkyard replacement door once - we finally settled for getting it to open and close within reason..... but it never had the solid Mercedes feel again.

Definitely you've got to weld something there, but dont remove the door unless you have no choice. I'd say rehanging doors is one of toughest DIY's anybody can do.