[timandsusan]

That is REALLY interesting! Because after our trip to Alaska and beyond in 2007, I discovered that one bolt holding the rear end of the left side spring had snapped. The end of the spring was resting inside the "U" shaped bracket against the frame. And the axles were out of alignment that cause alot of tire wear. So I got new tires and took the Monty into a trailer dealer in San Antonio. They welded two lateral pieces of angle iron between the frames and of course replaced the bolt. The mechanic who did the repair, told me that this was strengthen the frame. So, I guess I got the X-Factor installed in 2008 and did not even know it! What a deal! Anyway, no problems since but I have not driven back to Alaska over the frost heaves yet either. Always get good stuff on the MOC Site. Anyone going to the Spring MOC Rally can see the supports since we will be at the Rally.