If you're using the SL prop hub with the CARF blades, make sure you use blue lock tight on all 12 screws that hold the blades in place. I've had these and they come loose really easy. However, on the prop hub adapter, as seen the the phone. NEVER put lock tight on these. for some reason, these get really tight on their own. I've had to drill them out on another plane.
Don't use lock tight on these. They get really tight on their own.
Make sure to check all 12 of these each time you go to the field and use blue lock tight. They do come loose easy.