RE: V tail setup?
I have flown 3 different 'V' tail airplanes. One of two power planes had so much engine torque the rudder was ineffective until sufficient groundspeed obtained (not good). One was a Spirit sailplane with a flattened (not polyhedral) wing and ailerons. I didn't need any special mixes. Each control function seemed to work independantly well without the need for mixes. The 'V' was set at 110 degrees. Rudder authority was average. Ailerons needed to 'core' thermals better. I could have mixed ailerons to 'V' tail but I got used to it. It would make a nice experiment to have the same wing and two fuselages- one traditional and one 'V'- for comparison. Hope this helps.