JR12x balancing on mixed servos (4-servo elev setup)

Hi,

I’m building and setting up a Krill 37% Yak55m and have just read your article “How to Set Up a 40% Airplane with 12 Servos and no Matchbox (HT)”. But it dooes not cover my 4-servo elev setup.

I will use a setup with 4 aileron servos, 4 elev servos, 3 rudder, throttle and smoke. I will use a Spektrum Powersafe AR12100 receiver.
Since I need 13 channels I will run rudder on 1 channel, since it is quite easy to match. But, problem occurs with elevators.
I have set up as follows:
Right half will use Elev and Aux5
Left half will use Aux6 and Aux7
Elev configured with Aux6 as dual mate
Mix1: Elev+ to Aux5
Mix2: Elev+ to Aux7

Ok at this stage it seemed OK, but when trying balancing ONLY original Elev channel will be affected. I hope I have done something wrong here?

I would like to have it like this:
Right half will use Elev and Aux5
Left half will use Aux6 and Aux7
Elev configured with Aux6 as dual mate
Mix1: Elev+ to Aux5
Mix2: Aux6+ to Aux7 !But Aux6+ does not exist. ( in any case Aux6 to Aux7 does not work at all on elev stick input)

And then of course balance should affect appropriate channels if “+” is used.

Can you help me on this one?
I’m a competition level pilot (IMAC), part of Swedish national team and this is important for me. I’m also the only one (out of over 50 pilots in Swedish IMAC competing) using the 12x, so many are eager to see what it can do. Last season I flew the Krill 33% SU29 and that plane only uses 1 servo per elev half.

Best regards and keep up the good work,

Ulf Svensson

Sweden