I got my shocky flying... what a blast!!! Torque rollin' inches off the deck, flat spins, and on and on... sweet!!!

One question:

My shockey requires an inordinate amount of up elevator trim. I'm using a 1200 mAh battery pack, which is much too large, but it's all I have right now. CG is 55mm. Axi 2208/34, CC10, 6g servos... it's pretty light other than the battery. Anyone else have this problem? Is it the weight of the battery or an odd thrust angle or aileron rigging etc....?