Tried installing the shark fin on mine yesterday. I had everything ready and prepped. As I was about to place it on the roof, my shoe lost grip on my step ladder for some odd reason and I slipped. Then the fin stuck on to the roof and was crooked. Had to take it off and once you do that then it's over. No restarts lol. Anyways, I scraped off the 3M tape that was on there. Now I'm wondering if you guys have an idea of what I could use as an alternative adhesive so I could still salvage this $80 shark fin.