Hi, Im repairing an old yater HP for a friend who snapped his glassed fin. I noticed that the fin that snapped was a center fin glassed into the board as a side fin... lol. But due to my friend not having money he cant afford to get a whole set and of course you can't buy singles. So I'm considering cutting the tabs off an old right side fcs fin thats plastic/composite and using that to glass. I've done it a few times with success using glass fins, but am worried that the PU resin wont stick or will just peel off with time. I figured giving it a good sanding before would work but I'm in need of Swaylocks infinite wisdom. Has anyone tried this?