On the 3670 we had, the dealer installed toppers at our request before we took possession. The three smaller ones were always taut and drained off the roll. The one over the larger living room slide sagged in the center enough to pool water, so I made the PVC pipe support. It was easily assembled/disassembled and I installed it from a ladder placed at the end of the slide. If it separated while removing it, I used a long handled brush to pull it out. Usually didn't need to do that, though. Only the uprights were glued together, the long cross sections were just forced into the fittings.
