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Another comment about foam...""Because of the spa environment the steam from the spa water eventually seeps into the foam and condenses in the little air spaces inside. This begins to happen almost as soon as you put it in service."
Never seen these B4. Who knows, it might work, but jeeze, can you imagine having to deal with pulling that on and off every time? What a PITA! You might wanna think about all the dirt and such that will stick to the wet inner side of this thing and get dragged into the spa every time you put it back on. I have a Maxxus and yes the cover is big and heavy, but it takes on person 15 seconds to open or close it with a lifter.I really suggest you think this one through a bit more.txwillie
Only need about 6" of clearance.
Nevermind. I did not understand what you wanted to do. You want the cover to go to one of the sides not to the back.