The align T-Rex 600E 3D fins fit the raptor...or so I was told. Well, they do fit, but not without any mod. The screw holes on both fins were a few hair too close to each other so they need to be elongated slightly. Spacers(not included) had to be installed on the vertical fin in order to use the stock fin holder. Its suppose to help in backward flight, but I am not too sure if it really does. It is real light though and my c.g. balance well with these.
Best of all, its CHEAP. Less than 20USD.
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