I have a 2007 Forest River Wildcat with a Lippert/zemar frame. The pin box tore almost completly away from the frame luckily I noticed as the area is for the most part concealed from view. Forest River wouldnt speak to me at all in regards to this matter but did give me Lipperts email. My children our dog and I were stranded in a parking lot for a week in 105 degree weather with no generator (no AC). Lippert finally sent someone out to do a temporary fix. At that time I also showed them the cracks in the frame above the axles and spring hangers (you could see all the way through the frame) they said oh you will make it home (1,306 miles). As a result of them welding the pin box back on and strengthening it so well the frame is now buckled above the hitch. It is comon when you strengthen something for it to come apart somewhere else. This could have been prevented. The welds were an inch above the edge on the square tubing on a weak point the strong point would have been the edge. They only ran one pass this creates a hard spot in the metal leaving the weld prone to breaking, if a second pass would have been ran and the metal properly anealed and there would have been no hard spot to break. The tubing used for the frame was 1/8 inch steel a bit light for a 34.5 foot 5th wheel with a GVWR of 13,000 pounds. This is a design flaw and it will happen again. As for the permanent fix it has not happened. The only offer was to have someone instruct me how to fix it myself I find this unacceptable because it is not my fault their design was defective. As for now I continue to get the runaround this has been ongoing since mid april. Please inspect your 5th wheels this is verry dangerous especially because the emergency braking system would not have been activated due to where it is mounted. I will try to post pictures but am more than willing to email more if requested.