Yoda spoke very specifically about this in the Martee CD. I am going to point you to the picture gallery from the Pine Needles workshop on Chuck's site:
The pictures on the left are numbered. Look at the sequence of photos with the numbers 8546, 8547, 8548, & 8549. As you will see, the first two photos have Yoda's arm 'tucked in'. When he explained this on the Martee CD, he said Homer did not like this position as the right arm gave no support to the Lever Assembly. In the latter of the two photos, you will see how he positions his right forearm at more of a 90* angle to the left arm/lever assembly.
On the CD, he went on further to say that the best support is given at 90*. When we stand right here today, we apply a force at a 90* angle to the ground. This is also the reason Homer has been quoted as saying "Jack Nicklaus had the best right elbow in golf"....sure it looks like its flying, but it is also giving strong structural support to the lever assembly. I just noticed you can also a 'Top of Backswing' photo of Jack on the wall...notice the positioning/alignment of his right forearm to the lever assembly...pretty close to 90*.
If you look at the pictures of Diane in TGM, notice her rt. arm position at the top of any photo. It may not always be 90*, but it is definitely not tucked in tight!!!
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