tt-01 drifting (left) problem

After trying a lot of different things and setting, the problem of drifting left continue on my tt-01. I have tried add weight to the left - front, centre or back, replace standard shock with oil damper (help the problem a bit) and try to adjust the ride height. But the car still can not drift well to the left, it understeer initially when tried to turn in and when managed to 甩尾, it is hard to control, generally it will spin out (fully countersteer with any throttle) unless I keep the drift angle very small (ie almost straighten the car). It maybe my skill problem but I found drifting right is whole not easiler. The car is very much stock with the bearing, supension options only. Any other tt-01 user help will be much appreicated.