[Dominik]

hi Bob,

we made the doors tubes from 3/4" tubing, which will be bonded onto the single skin.

on those tubes one has to weld the door hinge and latch support.

for dimensions, just place the tubing with half a finger's gap in the relevant opening.

the pic doesn't show that the upper tube will slide all the way in to be hidden by the upper part of the door.

Dom