i have a bannana chopper.it chopped big feathers at first.they flew great,but i didn't like how big they were.i used the modification in the how-to section from Rob.it made them lower profile and they flew even better.pine hollow sells them for 21 dollars.if it turns out you don't like it,trade it off on the classifieds.send me some full length feathers and i will chop you some to try.my chopper is modified so they will be lower profiled.send me a pm if you want me to chop you some,steve