ORIGINAL: Tor

Yes elevator is a power off, decending harrier.

The pulling thing just shows you if it's off balance, it doesn't matter how you enter the harrier - if it's off balance, it will rock, depending how big the imbalance is.

On another note, too tailheavy is not necesarily a good thing. It may destabilize everything, try to move the CG forward to what the manufactor recommends.

Check the lateral balance, move the CG forward and maybe lower your throws on the elevator if they are really high. I my experience, it doesn't work to go crazy on the throws on larger models. Thought I don't know your model , I would say 40 - 45 degs is sufficient, more throw will destabilize things too. Personal theory is that you want the elevators to work (airflow, renoylds numbers on larger models etc.) rather than acting as brakes.

I know that moving CG forward and lowering throw may go against other people's normal advice... But as the saying go "too much of a good thing..."