IMO 10.5 lbs is perfect for this size and you more likely have a CG problem than a weight problem.
I agree with 3D Joy about the cg issue since i flew it this sunday as well n found that after getting warmed up to the feel of the aircraft i got comfortable with the CG. is it possible that i remove the 3oz. that i added upfront? how will it perform? im scared n dont wanna take a chance without consulting someone well versed with the issue.
3D Joy, what engine are u using on it? i'm using a 17X8 APC n i seem to build up too much airspeed on throttling up n specially on downlines. should i shift to a bigger prop?
Seanychen, how do u like ur cap? what type flying do u generally do? does urs 3D? whats ur setup?
will keep u posted on its future flights. thanks