RE: 783 withy V-Tail and Flaparons Also
For the spoilers there are a few different ways you can set this up. They will be active on the spoiler knob for trim already, unless you go to the POT.X (X being the channel number) function and inhibit it. All the knobs have pre-assigned functions in glider mode and there isn't a way to re-assign them. You can set this up as spoilers with the throttle stick in the Spoiler mix function. You can also set up a mix to put this on a switch. To do this, set up a program mix, I would use mix A-D for this mix, mixing channel 5 to channel 5, assign the mix to the switch of your choice by pressing the channel key until the mix says SW, then press + or - to set as desired. Now press the channel key once to get back to the main mix screen. Flip the switch to the on position, and set the rate as desired.
To set it up so when you move the aileron stick the rudder moves, set up a aileron to rudder mix again using one of the mixes A-D, assign to the switch of your choice just like above, and set the rate as desired.