Jack. Following your troubles as we are having same or very similar issues with our 2012 36RL. Ours had the relief crack and trim covered when we bought our RW in 2014. We upgraded our truck from a F250 to a F550 which has a 10k rear axle. Ride is stuff unloaded but rides like a Cadillac loaded with the heavy pin weight in the bed. I can view the pin box doing some bobbing up and down when I look in the mirror when towing. Our stress crack area below the front corner of our bed slide out has recently bowed and I believe it is due to aluminum tubes breaking and poor welds. I tried contacting Tim Cress at crossroads but he has not responded at all. Please let me know what happens with yours. Email picture progress if you could please. Chrisfendt@mail.com

I will try to send pics later.

Thanks. Chris.