I've been flying my BME Ultimate with a BME 110 and Pefa LL cans for a couple years. No problem with balancing with or without the cans. Flys great with the CG set just behind the aft recomended balance point.

Weight is 27.8 lbs using eight JR 8611s with a dual battery/receiver setup. The only effort put into weight reduction was using a carbon fiber MLG, saved 10 ounces.