If you will do a search on this or other forums, you will find lots of answers to this question, as well as solutions to topper flapping noise caused by wind.
Beach balls under the topper, pool noodles, ropes thrown across, constant readjustment of tension, and and and on.
People either love their toppers, or hate them.
I had one RV with three slide toppers from the factory. Never again. I found them to be pretty worthless for debris and water protection, extremely noisy in windy conditions, and needed constant adjustment. The only benefit was a slight decrease in heat caused by sun.
If they ever design a topper that works and doesn't require stopgap measures to actually attain their supposed benefits, I might look at them again.
My advice? Do like I did. Wait until the topper fabric needed replacement due to sun rot (just like a regular awning), and then just remove them.
Good luck in your endeavor!
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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