I went and looked at your manual and I think you can do it my way. Here is the part that tells about wing type and selection flaperons and even says you have servo reversing and that should give you what you want.

My son is in KC and very close to Liberty. been there for a few years. We are going down to see him in a couple of weeks.

Get back and let up know how you come out.

sticks

ss the Increase or
Decrease button to turn the flaperon
(FPR), Delta (DLT) or
V-tail (VTL) mixing on or off.
OF = OFF
ON = ON
INDICATES WING TYPE FUNCTION
FPR = FLAPERON
VTL = V-TAIL
DLT = DELTA
WING = WING TYPE SELECTION
MIX
OF
ACCESSING THE WING TYPE SELECTION FUNCTION
1. Press the Scroll and Increase buttons up
simultaneously and hold.
2. Turn on the transmitter to enter the
System mode.
3. Press the Scroll button until the “MIX WNG”
appears on the screen.
4. Press the Channel button to select either
the wing type (WNG) or V-tail (VTL) mode.
5. Press the Scroll button to access the
modelname function.
6. To exit, press the Scroll and Increase
buttons up simultaneously.
Flaperon, V-tail, and Delta mixing are available
for specialty aircraft that require those
functions. The flaperon feature mixes flaps
with ailerons so the ailerons can be drooped
for takeoffs and landings while still functioning
fully as ailerons. V-tail mixing combines rudder
and elevator for V-tail operations. The Delta
wing function allows the aileron to also act
as the elevator, while retaining independent
use of both functions. The Delta wing function
allows the ailerons to also act as the elevator,
while retaining independent use of both
functions.