Hi Keith,

What incidence are you running on the stabs? Sounds like you might have + on it to me.

I run 0 degrees incidence on my Impact stabs with +0.25 on the wings and 0 downthrust & 3.5 degrees right thrust. Engine is YS 140lm with 15x12 APC prop & 30% Wildcat 3DLV fuel. C/G is on the wing retaining bolt and can confirm that the model feels very locked and tracks great.

A golden rule that I was taught right from the start is "change 1 thing at a time", trimming issues can bog you down if your not careful and I know how frustrating it must be, hang in there buddy!

Hope my set-up details help.

Andy.

PS. Done lot's of snaps now with the Impact after repairing my fuselage and installing the ladder crotch and I am pleased to confirm it's STILL in one piece!