I have fooled with this a little more. You can use just 1 point mix if you have one of them open.


First you need to assign the flap channel to three position switch that you want to use.
Then open programmable mix six or seven
It should look like this.
Mix: on
Mas: flap
Slv: elev
Link: on if you have dual elevator servos mixed in the radio
sw: whatever 3 position switch you want to use
posi: null
Go to the first screen and set the points to the percent of elevator that you want in each position.

This will only use one mix.