This may be a coax prop question, or it may not. I fly Hoverfly Pro on a Coax xy8 and x8. Both with avroto 2814 on 4s. I have tried xoar 12x6 top and bottom, 12x6 top/13x7 bottom and the best results seems to be 12x6 xoar top and 13x6.5 APC e-prop bottom. I get perfect 50% throttle but gains...