Could it possibly have something to do with removing the stagger or any of the other changes you made. Not criticizing just trying to understand why yours displays a tendency to tuck at speed when none of the 3 or four I have flown have no such tendency. Power shouldn't be an issue one had a Supertiger .65, YS 1.20, 32cc gas motor and the tri motor.
The heaviest I have flown mine is with the ashes of a departed friend to be spread over the flying field somewhere around 17 lbs. I did not know the cremated remains could weigh as much as 6 or 7 lbs and this was with that weight 6 inches above the top wing. No adverse flying characteristics.
Dennis
Last edited by Propworn; 03-20-2019 at 06:17 AM.