I have over $1000 spent. 3 drones (2 old dji and a scarab knife). 3 transmitters fly sky th9x, fly sky ct6b, and fr sky Tara is x9d plus. 4 different receivers (currently trying to use for sky x8r, also have d4r-2, and a few others). Currently using a SpeedyBee f7v3 fc. I have never, not once...