wrote in message

The top hinge will be in 2 parts, having a slot in it and a bolt
holding the halves together. Loosen the bolt, push the door tight,
tighten the bolt.

Maybe I was not clear, the top section edge, does not press against the
jamb. In the middle of the door is the closing mechanism, but in each top
corner are brackets/guides with 2 rollers.

Not sure where does the force come from, to press the very top of the door,
against the jamb.

RichK