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This is a Cover Caddy III. It does not have a X bar. Its a three piece cover. The first opening is only 12" wide, so you can put chemicals in without flipping over a large section. But once in the tub, you slide the cover onto the caddy and then it swings down. If you are not using the caddy, it can fold away flat against the tub.
No, TN, you silly goose. I move the hot tub in every night!
Josh, To answer your original question... I sold the reg style lifter that goes across the seam for 20 yrs and never had a customer issue with the seam.