Hello all I purchased a Blade CP from a gentleman that could not get it to lift straight. It took me two days to get the blades balanced and tracking straight. After preflight checks and test run ups, the swashplate tracks level and the blades no longer wobble. The only problem I am having is the heli drifts to the left when it gets light. any ideas?

Trim to the right?

The trim is not enough to stop the drift to the left. I can move the cyclic to the right but it gets out of hand pretty quick.