I've read a lot of posts about this but I'm still a little confused.
I have a 9cap tx and 7 channel rx
Funtana 90 plane (dual elev servos, dual aileron servos)
left aileron on ch. 6 (flap)
left elevator on ch. 7 (aux1)
flaperon is off
What is the best way to get flaperons and spoilerons working on switch C?

First, go into the AUX-CH menu and set channel 6 to switch C. This puts the flap control to that switch. Put the switch in the center position.

Go into the Flap Trim menu (in the advanced menu) and turn it on to 100%.

To get the ailerons to droop as flaps and reflex as spoilers, you need to turn on the flaperon mix. Adjust the left and right movements of each aileron to get the proper amount. Now flip switch C to the flaps down position and adjust the %. Reflex them and adjust the percentage.

Thanks Bax, I'll give that a try.
I have another question. I set the elevators up using "endpoints" to get the same amount of travel on both halves. When I change the trim for flight, one half moves more than the other. Mechanically they are the same and they move together with normal inputs. Any way to correct this?

griffin

When you change endpoints, you change the throw ratios. You must set up dual surfaces with EQUAL endpoints as close to the same mechanically as possible. This will prevent the variances you've been seeing.

Trim amounts change because trim in the 9C is a percentage of total travel. If you adjust the endpoints to bring the total travel down, then the amount of trim will change.