My brother-in-law and I mounted them on both of our fifth wheels. Each installation took 3.5 to 4 hours. His 33-foot Montana, 35-inch installation and wet-bolt kit. The brackets are broken on one side, all brackets are worn. My 33ft Gulfstream has a 33" wet bolt kit and an X-Factor crossmember (middle). For some, the wear and tear didn't disappoint. We blocked and 4 corners of the trailer and removed all 4 tires, mostly mounted smoothly, some peeking to align the springs. Both trailers fit much more evenly and surprisingly feel more stable when walking in them. I would also recommend 3 components.
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