Before I found TGM, Jim Mclean's teaching seemed to be very good. But now I scratch my head about almost everything I see that he has written.
He writes a lot about the shaft flattening out on the down stroke, The wide to narrow action on the right arm and the throwing motion of the right arm.
I'm not sure if many people here have studied much of his work, but it seems way off in comparison to TGM.
Would love to hear thoughts, not looking for bashing.