Actually, the BME 110 puts out slightly more power than the 100cc engines so even if you did have to add 2lbs of lead you are still better off. In all reality, with a little thought, most planes can utilize the low weight of the BME. It's just that some planes will need more work. On my H9 Sukhoi, I moved my elev servos up to the middle of the fuse and ran a pull pull system. Not alot of work and I ended up balancing perfectly.

What plane is it going in?