RE: V-tail setup?
Jonathan,
Go with what Stefan says. The 8103 has V tail on the sailplane program. If you want to use acro, use mix 5 & 6. I've done this before and it works very well. The reason for using these specific mixes is those 2 have trim included so when you trim elevator (or rudder), both surfaces will move. Use any other 2 mixes and only 1 surface would move.
Naturally, you would not use a Y connector. One servo plugs into the elevator channel and the other into the rudder. The mixing takes care of the rest. I forget which way I plugged mine in, but on elevon, aileron is right and elevator left, so try rudder right and elevator left. Mix 100% both ways on both mixes and set the mix ON all the time. Works like a champ.