We have a 2013 36 ft. Palazzo which is currently in the shop for the 4th time to repair the large slide out. Fortunately we have an extended warranty, although I think Thor should be covering this under the original warranty as this is an ongoing problem! The 2 rail system is being replaced with a 3 rail system. Hope that takes care of the problem! Thor's customer service is less than stellar as reps don't call back as they say they will, part didn't get ordered when it should have, etc. has anyone considered filing lemon law in regards to this slide? Seems to be a widespread issue and maybe some pressure could be put on Thor to make good on its product!