It seems to me that APC's, and MA's break just as easily. The only thing I could say to help you is on your prop set up. I put mine on so that when the engine is off, and the shaft is centered in the free floating range, thats where I put my MA on horizontal with the wing. This way it can move either way as you come in to land. And as you can gather I use MA's, so when they break it doesn't hurt the wallet as much.