I see where you can specify the quad frame type but what about the plane?
Can you setup a flying wing with elevons and a rudder? I did find this:
"The ELEVON_OUTPUT option is designed to operate exactly as a hardware elevon mixer would operate. To set it up follow these steps:
Setup your transmitter with no elevon mixing
Set both RC1_REV and RC2_REV to 1 and ELEVON_MIXING to 0
Start by setting ELEVON_OUTPUT to 1. In later steps you may adjust this to 2, 3 or 4.
Put your APM into FBWA mode
Roll the plane to the right and observe what happens to the elevons
If the two elevons move in the same direction, then change ELEVON_OUTPUT to 2, and try again.
If the elevons move in opposite directions, but the APM is correcting the roll in the wrong direction (the left elevon is going down and the right one is going up) then change RC1_REV to -1
Next try pitching your plane up. If the elevons move in the wrong direction then change RC2_REV to -1
Now change to MANUAL mode and adjust your transmitter reversals for channels 1 and 2 to produce the right movement in MANUAL mode."