Need help on sustaining lag that is generated during backswing pivot. This is a problem that causes me to lose the flat left wrist at impact.Particularly on swings that are approaching a full backswing. I have recently begun TGM and have had one lesson from an A.I. Video shows significant clubhead throwaway. I have played this way for about six years and have achieved an index of 7.3. Anyone else have this problem First time poster.Thank you all.