Warren Bennett of the Warren Bennett Golf Academy demonstrates how two different backswing structures can fix a hook or a slice. He introduces the 'early set' for hookers to prevent the club from getting stuck inside, and a 'wide lasso' feel for slicers to encourage the club to drop on an inside path during the transition.
Hookers should use an earlier wrist hinge (90 degrees early) to keep the hands in front and prevent the club from dropping too far inside.
Slicers benefit from keeping the clubhead outside the hands during the takeaway to create a 'lasso' effect that drops the club on plane.
A shorter arm swing with a longer clubhead swing (via hinge) creates more stability and better face control.
Exaggerated 'feels' are often necessary to move a real-life swing position just an inch.
The backswing structure directly dictates how the club will react during the difficult transition phase.