Just got a DX8, and am setting up my eflite RV-9, and was wondering what setup I need to use for the wing type. I have 2 aileron servos, but they are y-cable connected to one channel. The two configurations are two servos (one per channel, or one servo, one channel. Dont see any option for two servos through one channel. Which setup should I use.

I am also using flaps on this plank, and was wondering what elevator Ineed to mix in, as I increase flaps deployment. Do Ineed to add up elevator or down, as I increase the flaps down ?? Thanks