Hello everybody. I have an APM 2.8 with Emax ESC 30A Blheli. And there's the problem. At the beginning, when ESCs were connected to RX on my AT9 Radiolink, they seemed to freeze for a milisecond and kinda freeze or shake. I didn't consider it as some serious problem because they (supposedly) are made to work properly just if used with a flight controller. So I put my quad all together. What came up? ESCs do not want to calibrate with the APM 2.8 unless the throttle lower value is 900. It makes a huge problem because I can not use failsafe then as it's lowest value can be 925 (correct me if I'm wrong) and if i calibrate it like that (changing the endpoints on TX and a little trim) motors stop at the highest throttle. I've been struggling with this problem for more than a week now and I have completely no idea what to do next. Maybe it is the ESCs that are faulty?