I am not familiar with the transmitters you have. I am using 9x radios with my Clark boards. I have the right stick controlling foward, reverse, and steering. The left stick I use for turret rotation and a quick flip up will fire the cannon. All the other left stick functions I have programmed to switches.

Throttle start/stop engine
Rudder light on/off
Elevation fires the machine gun
Aileron cannon depression
Gear cannon elevation
Training fires main cannon