Rob,
The helicopters I have seen don't all track in the same place. What I posted before re the transition in the rotation is purely from what I have observed in international competition, of which I must admit to limited exposure.
The actual track of helicopters does vary from bowler to bowler, but not that greatly.
George,
I wouldnt mind discussing the relative merits of static balances for helicopters with you and Ron. You state that because they use 10 to 12lb equipment that they cant get anything with decent cores that static weights don't mean anything. I would have thought that because of that, the static imbalance would have been even MORE significant as the dynamic balance of the more advanced cores is not available to them.
Those few helicopters I have drilled for and seen, have in general had most success with thumb weight, negative side weight and bottom weight, as this has provided the transition I posted about earlier.
Now, maybe I am reading too much into what I have observed. Maybe all the coaches and drillers currently working in Asia are over complicating this issue, but from what I have observed and put into practice, they do seem to work.