Here's a new how-to on fixing your busted glass-on fin from your friends at korduroy.tv . Glass-on fins are the best but are easy to get knocked off by rocks and dickhead airport luggage dudes. Here are a few tips on how to get your board cutting back in the water again. Note: The amount of rope you glass with really determines the strength of the repair. If the fin is bigger than the one shown you might want to let the first round of fin rope cure then double up with same amount or even more strands for a more sturdy repair.