My Blade 450 3D has the stock E-flite G210 gyro. Recently I've been having a counter clock wise drift. Belt tension is good and tail blades are proper. I've been upping the gain in 0.5% steps (now at 79.5%) without any noticable effect. I'm considering replacing the gyro and would like a suggestion or two as to what brand and model to use. I'm strictly a novice sport flier and don't want to have to sell the farm for a better gyro.