Hi JVB,

I'm using an APC 14x8 for pattern. Still I didn't try to fly 3D, but I think that an APC 15x6 is good for 3d. Is just my opinion...

Jeff-RCU

I had the same problem with mine. The solution was put the elevators servos in the tail. I dont remember the exact point of CG, I'm going to check the point later and then to tell you.
I had the servos into the fuse, in the CG aprox.

Hope that I have been useful.
Sorry for my english, I speak spanish.

Hernán.