Multiplex Smart SX 6 Position switch
The Multiplex Smart SX is theoretically a 5 Channel transmitter. The 5th channel is controlled via button/throttle-trim. This channel is not easy to modify. Because I will mostly use flying wing designs (no rudder) I decided to remove the rudder potentiometer and connect the 6-pos switch to that instead.
This leaves me with a 3 channel transmitter (aileron, elevator and throttle) and a 6 position switch. Thanks once more to Sämi for his nice soldering job.
Removing the potentiometer.
Adding the 6 position switch