I had a 2014 Columbus and weigh well over 340 at the time. I made some 3x3 plywood covered with carpet. The carpet protects the roof and the size spreads out the weight. I made 2 of them one to stand on and one to move to my next step.
Good luck
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Camping from 2008, Life member Good Sam / KOA / iRV2
2014 Columbus 320RS
2011 Ford, F250, 6.7D, SRW
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