I have a 2007 Bighorn 3055RL and recently discovered a catastrophic problem with the frame. I was having my wheel bearings packed and when they finished they were lifting it up to remove it from the service bay and the pin box would lift up and the walls didn’t follow. The service tech removed the skin and found the frame was broken in a few places. They looked into things and found that the brackets that attach the walls to the frames were never attached. The holes were never even drilled to put the bolts through. We were very lucky they discovered this since it couldn’t be seen with the skin on. The whole frame had been flexing for years with no support from the walls. We could have had our retirement ended quite prematurely. Has anyone else had this problem?