My slide topper is horizontal with little or no slope. It puddles water when it rains and flaps in heavy winds. I have been reading various solutions on the forum from beach balls or plastic support underneath, or a solution I chose, a pipe over the slide topper.I used 1 1/2 inch pipe. I have not seen any pictures so I will put some in the post. I will be heading out soon for a week to try it out. I am planning on the rain to flow off the rear of the topper.
2012 Crusader 26RLD, 2017 F-350 4X4 6.7.
Hayes Autoformer, Correct track, Maxxis 8008E, Andersen Aluminum hitch.