Redfox A3 F722 AIO Flight Controller (35A/45A)Look, another All In One flight controller promising to be the brain of your next sub 250g masterpiece. But hold on. This one, the Redfox A3 F722 AIO flight controller, actually gets it. Cooked up by the featherweight fanatics at the Sub250 team, its built specifically for the 2 to 3. 5 inch class where every gram feels like a brick. It combines a beefy F722 MCU with a punchy 35A or 45A ESC, giving your lightweight FPV build the headroom it needs to