RE: Phase 3 EF - 16
I have never had any CG issues with this plane. It should balance right at the front of the cheater holes. Even with a 1500 watt setup on a 6cell 2250 mah pack it flew rock solid. The only issue I've ever had was a difference in washout at the wing tips inducing a roll. This was caused by my glass application and corrected with light heat and persistence. Make sure the tips of the tailerons are lower then the root. If not then they are installed wrong. I have heard of this happening... Hope you work it out.