After flying since the 70’s using stick mode three, this left-hander needs to stick with it, I think.
Mission planner does not allow this mode, apparently. What can I do? Need some help fast- the good weather is coming, and I’m not ready!
Well, with a modern programmable radio (like a Taranis) you’ll just have to assign the channels appropriately to the sticks movement. ArduPilot, by default, expects the AETR on specific RC channels regardless of radio mode.
But if you can’t assign channels freely you’ll be able to map channels using the RCMAP parameters http://ardupilot.org/copter/docs/parameters.html?highlight=parameters#rcmap-parameters.
Safe flying 