True on the flaps and on ailerons you place the control links on opposite sides. but instead of using a y to channel one. You can split the ailerons between right aileron on channel one and left aileron on channel six and set your radio for flapperons. Elevator with two actuating servos, set up many different ways. So as follows:

Ailerons on one and six.
Elevator on two and seven or eight if slaved.
Throttle on three
Rudder on four
Gear or flaps on five

Thats 7 channels, if you are using JR the channel numbers are different for ailerons and elevator.