Chap - tires are balanced so I don't think that contributed. The microwave didn't actually come out - it appears there is a metal strap holding it to the shelf. It was the shelf bracket(s) that broke. The initial break was at the rear. When we set up at a campground, the entire MW was tilted about 30 degrees to the rear. I fixed that pretty easily and feel that it's pretty secure.
The second break occurred on the left side, where the little corner cabinet is just inside the entry door. There really doesn't appear to be anything there to attach the shelf to, although there is a piece of 1X1 attached to the underside of the MW shelf here. As a temp fix, I put a couple of wood screws from the cabinet side through into that piece of 1X1 underneath the shelf. That cabinet backing isn't sturdy at all and will need something further for reinforcement prior to another long trip. I just need to figure out what to do.
Bob
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