The shark fin I'm currently using just isn't holding up after a year of abuse racing in the So Cal desert. I've been looking at the Scotts, ZipTy, and FTD shark fins. Anyone have any input, good or bad, on any of these shark fins? The shark fin I have now gets bashed into the side of the rotor and I've had to replace one rotor already this year. I need a shark fin that can take an extended beating and hold up.