So how do they do this? I am assuming they will add additional seams next to the original ones that will be riveted with Olympic rivets? If so you have twice as many penetrations thru the roof with rivets that are notorious for leaking. That's a no brainier, say no thanks! If you can't see it from the ground why go asking for trouble? What are they from? If its hail damage many smaller dents might fix themselves,( the endcaps won't). But what kind of winter damage?
Shelly : TAC NH-6 | AIR 41359
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Parts needed : Braund Antenna front tube fold down model!