We have a 2011 Challenger, 3710 with the full wall slide and one more on the passenger side, as well as one on the drivers' side. I sure that our configuration is similar, if not exactly, the same floorplan as the one you are looking at. Other than the full-wall slide making a noise on the initial travel while opening (this was corrected by Damon) we have had no issues with the other slides. The coach appears to handle the weight of the slide/s with no strength/frame problems. We have over 30,000 miles on our Challenger, and much of the travel has been over some pretty rough highways (the northeast) . We love our Challenger and believe that it is the best value for the money. E-mail me if you have additional questions or concerns.
Bronk
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