[BerntR]

I can't see where Homer could possible have gone wrong with his dissection of impact and ball compression in TGM.

HK's discussion of impact was very theoeoretical. I think we need empirical data to sort out how much small variations in the impact alignments matters to the energy transfer.

In any case I think HK's explanations here tells a lot about the difference in quality of ball striking between great players and high handicappers.

It may appear that the difference between a draw (with as close to perfect impact as it gets) and a fade (where the club face rotates anti clock wise and the ball rotates clock wise) is negligible for a good ball striker. But I really have to flush a fade to get the typical draw distance, so I am not convinced that a fade goes as long as a draw as long as you negotiate the difference in adding loft when hitting a fade.