I have a 21 Gladiator with a DiamondBack HD cover.
I have found that I need a cap and not a bed cover. Like new. I have the bed rail system, so the clamps are designed for that. I also have the rest of the cleats, I just never installed them.
All you will need to purchase extra is a front...
Could you tell me how much height the cover and cleats added to the rails of the bed? I back under a storage rack in my garage and don't have much room to spare.