What a pain in the ass. The doors do not have the same shape as the fuselage, so they have to be “coaxed” into shape with force and heat, applied over a long period of time. I used all-thread rods to pull the doors in some places, and 1×1 dowels to push in other places, all while keeping the doors toasty hot with halogen lamps. Crude, and not very effective.
bzvelocity.com 