Hi Dave thanks for the info.Looking at my installtion the front of the starter is around 20mm past the back end of the tank i can only think that your engine sits further forward than mine.i have weighed the lead that i put in the nose to get it to fly nice and it is 18oz!!!! i can only move the engine forward with some ali plates like the jet cat mount to cure the lead in the nose problem.The Falcon weighs 3 lbs which cannot be more than a 120 regards Keith