RE: What servos to buy?
Yes, the wall charger that comes with the 7C will charge both the transmitter and receiver batteries at the same time, or separately. The transmitter lead wire on the charger has a round plug that goes directly into the transmitter and the other lead wire on the charger has a flat end that plugs into your receiver battery or into the charge receptical wire on your on/off switch if your batteries are already installed in your model.
big dan