I was the only one to do this set up at Markam. First set the flap switch to the center then setup your flap to the first position flaps default. Next step is to set the switch to ELEV position using the mix program to trim the flaps to neutral. After setting the neutral & first position flaps now put the switch to land position and repeat the second step for full flaps.

(Hoping you know how to use your radio Mix program)