Actually you can program several sticks in as long as the analog inputs remain on the primary.
Second one can be setup for trim or many other functions.
Plus all the other throttles, and buttons will work.
What you can't do is set 2 sticks to both have analog X,Y,Z doing pitch, roll and yaw.
Sent PM, Let me know whens a good time to hook up viper. We can DO this stuff!