Here, the first post in this thread is what I did with Karen's door. It seems to have worked well; at least I haven't heard otherwise!
http://www.fiberglassrv.com/forums/f...-up-32394.html
The usual problem with
Burro, etc, doors is that water gets into the inside of the door and the wood core rots, allowing the lower, curved, part of the door to sag, creating a big gap (and mismatch with the body) at the lower part. There have been plenty of fixes posted here, from kerf cuts and re-glassing, to threaded tension rods, to dismantling the door completely and fabricating a metal core.