RE: V-Tail?
V-tails a bad idea ????? Nonsense
Here is my Whirling Dervish. It flew really well and was fully aerobatic. As you can see it has a v-tail.
I actually tried a normal tail as well but there wasn't that much to choose between them. If anything the conventional tail gave better stability in strong winds but the v-tail acted like a dihedral wing and gave a higher roll rate when used with dc roll on the head. Personally I like the look of a V-tail. If you are interested the internal V angle was 120 degrees. Pitch stability was the same for both types of tail.
Sean