Ah, just the discussion for which I was looking. I am pretty sure the extension with my left arm is not good. Just one more thing on which to work. I don't understand how I can pull my left arm down with my right at set up. You mean with both hands on the club in a normal address position? I can see kind of pushing down on the club whereby I stretch my left arm but I don't understand your instruction. Also, this extended position has to be evident when you get your hands waist high in the backswing, no? I think about my left arm being really stretched tight at that position which is the thing I find so difficult to do.

Besides explaining your instruction, what are some problems besides loss of power one encounters when the arm is not extended?