So far I have the gee bee put together with everything inside servos receiver tank and all hardware it is coming out to 7.5 lbs. Without the radial engine cover, and with the saito 125 installed it should come out to 9 lbs. Then I have to balance it hopefully I can stay under the 10 lbs mark. I was shooting for 10.5 lbs but now I want to be at 9.5 lbs.