I installed a topper on the slide for a "16"Vengeance 29V. Placed the enclosed rail up next to the top rail for maximum slope on the topper. We used the 1" RV putty tape under the rail and screwed away using the enclosed screws. Found something to hold on to with every screw. The Vengeance is a tin and frame construction. The topper was a Solara purchased online from CW.
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