It's a good idea to inspect any Lippert frame for cracks and bad welds. Mine failed on my 2010 Keystone Cougar in 2010 - fourth trip out. Dropped the 5er onto my truck bed while going down the highway.
2010 Cougar 322QBS 5er
2007 Dodge 3500 SRW Megacab, 4x4, 5.9L Cummins, 3.73, 48RE auto 2014 RAM 2500 Crew Cab, 4x4, 6.4L Hemi, 4.10, 66RFE auto ** on order **
Everyone should inspect their frames. Especially if it is Lippert. I have some nice photos I would love to share of my Lippert frame failure. The inspection is quite easy and will take very little time.