I've never had or seen a 0-0-0deg model fly well.Regardless of what ever design I always end up with say 1deg down 2.5-3 deg right thrust on the engine. Wing set at about plus 0.5 (ish) deg and stab set at about 0(ish).Infact it's became so evident years ago that I just build the models with these setting on the board.I've tried the ol' mixing rudder with throttle instead of right thrust but just decided that right thrust was easier. Only thing I kept was a little left rudder at very low throttle settings.If you're happy with 0-0-0 Tony you're going to be super delighted after a few tweeks. Start with the engine. Slowly pull up to vertical, let go of the sticks and keep adding right thrust until the model goes dead STRIAGHT up.You know the routine.