I have something similar, it works quite well, the trick is to use one that might work with however you store your hardtop. I use a fritzi hoist, so I got the cover from the same folks, this way I can easily install the cover when the top is hanging on the hoist. Same is true if you use a cart.
-Lewis
'66 230 sl 113042-10-016238
67 saab sonett II #43 of 258
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