Today, after some experimentation, I found a focus on right knee flex really helped me slow my body rotation and stay on my right side longer in the downswing - also good extension in follow through - straighter shots and better contact.
My tendency has always to get a bit standard knee actionish - a straigtening right knee in the backswing. Is a focus on more of an anchored right knee a good way to go...
Through the centuries, most Golfers have straightened their Right Knee during the Backstroke and their Left Knee through the Ball. For this reason, Homer Kelley defined the procedure as Standard Knee Action (10-16-A). No less than Bobby Jones and Sam Snead demonstrated that it is highly effective.
Nevertheless, Homer designated Right Anchor (10-16-C) as the Stroke Pattern Variation in both 12-1-0 (Hitting) and 12-2-0 (Swinging). He chose the term 'Anchor' because, when the Golfer keeps the Right Knee Bent, "it feels and acts like the body has a solid anchor to the ground" (7-16). Personally, I have always used Right Anchor and found Homer's words both comforting and compelling. Beyond that, I was delighted to find that I had nothing to change as I adopted the Hitting and Swinging Stroke Pattern Components as listed.
Still, Homer Kelley would have been the last to mandate that a player use Right Anchor instead of Standard. I remember a conversation we had regarding Loading Action:
Young Yoda: Why do you recommend Snap Loading for Swingers?
Homer: I don't recommend anything.
Young Yoda: But it's in the Stroke Patterns...
Homer: I couldn't put all three in there!
Still, and this is 'just me'...
I don't think you would find many Standard Actions on a BOSU Ball.