Cooper not an uncommon scenario. Most of the strapless biminis will not fold or open without removing one side to tweak it into place around tower speakers.
Use the base of Moby bimini, add a couple of supports for backpacks, maybe a cooler position, and if you wanted to get real crazy add in a mister plumbed throughout the frame, tapped off of the ballast system.
Bimini Isle out in Tracy, they do some really nice work. All custom, whatever you ask them to do they will do, ours is huge, up and out of the way so you can get to your board rack easy, and you can walk under it no prob and fits easily underneath the tower speakers.(209) 832-0793