Scale Soaring UK

I’m gradually moving, model by model, to my shiny Frsky X20 transmitter.
Overall it’s going well and I’m (almost) enjoying it but I’ve got stuck with an incorrect flap movement on a 4 servo wing (1 aileron and one flap each side).
The mixes are:
1. Butterfly (crow) so ailerons go up as flaps go down
2. Camber, so all 4 surfaces can be trimmed slightly up (for speed) or down (for thermal)
3. Aileron to flap mix, so flaps move slightly with ailerons.
I’ve used the pre-made mixes for all of these and it was all going swimmingly until I noticed that the aileron to flap mix drives one of the flaps the wrong way (i.e. the flap moves the opposite direction to its adjoining aileron.) This flap moves in the correct direction in all its other mixes.

Groping around in the aileron to flap mixer, there doesn’t seem to be an option to reverse just one flap.

Has anyone with ETHOS experience got any suggestions?
If you do reply, bear in mind that I’m rubbish at this sort of thing so please type really slowly
Or maybe point me towards a Frsky forum?

Thanks wonderful people.

Sorted!

It was a simple fix. Must be, I figured it out

I just inverted the errant flap in the aileron to flap mixer, then compensated by also inverting this flap in the camber and butterfly mixers.

The more time I spend on ETHOS, the easier it gets.

It is a great system.