[Martee]

Martee,

We can agree that weight shift is irrelevant to power generation (with obvious exclusion of alignment issues.)

There are many muscles in the legs all with their particular functions. I cannot tell you which (and be sure to include the glutes) do turn the hips but I know they are down there.

You can turn your hips can't you? And you do not have to turn them fast to produce momentum. Do muscles muscles other than those in the legs cause your hips to turn?

Do you understand that you cannot turn your hips with muscles in the upper body? Well at least not in the directions that golf downstrokes require.

Golfie

Add the hamstrings for rotation along with the glutes which as I understand it don't belong to the lower body/leg grouping. Also the oblique's play a role as well.

It is not clear to me which muscles cause which movement since I have conflicting data.

Again I will go back to my premise, the lower body amplifies the power of the upper body. You can't swing the golf club with only lower body movement, you can however swing the golf club without lower body movement (e.g. sitting on chair and hitting the golf ball).