RE: rx battery
Dano
A lot of the very experienced pilots and vendors suggest you put a couple of 1N3007 diodes on the positive battery lead to step down the voltage a bit on a 6.0v battery pack. A fully charged battery pack will be up near 7.0 volts, and this is known to have caused problems with receivers and ignition systems on gas engines. I have done this and checked it out under load with a expanded volt meter. The manufactures also state use only 4.8v -6.0v and they don't mean 6.9 volts. You might get away with it, but best to be safe. Solder the diodes end to end with the black bar code facing the device to be charged. Put them between the battery and the receiver on the (red) positive lead. I used a short servo extension so that I could just plug it in as needed.
I will try to upload a diagram I got off this RCU site. Good luck.