open pilot

Hey everyone. I'm still fairly new to the multirotor hobby and had a question i was hoping I could get some help with. I have a QAV 250 running a cc3d. Im interested in switching to clean flight from open pilot. I have found plenty of resources on how to flash clean flight on to it. Just need to...

I'm in the middle of my first racing quad build and having problems with my transmitter communicating with the FC. really need some help! Equipment: Emax ESC (Simon K), CC3d FC, Spektrum transmitter and receiver (AR7700). From the start I had issues getting the ESC's to go into program mode. I...