I just bought a JR xp8103 on E-bay. and it appears to be working alright. The problem I am having right now is how to get the receiver channel programmed into the transmitter? There does not appear to be any function for this and no info in the manual about it either. Is it an automatic thing that just finds the receiver channel when it is powered up or do I have to be using a special receiver?? Any help would be great