OK, now I need advice. Mine is a cheapie, shredding and blows off easily. At work, even with various clips. Tired of laying on the ground fiddling with the cross tie. Want a custom fit, that is taught. Usually end up with a blok-it 200. Stored in a carport, high and dry, cement pad, shade. One side does get sun which causes shredding. About 4 years old At work, if it blows partially off coworkers get concerned.