On Forces active in the Golf Swing....

[no_mind_golfer]

So if any teacher mentions CF . . . he's out?

YEP --- Sure indicator of a snake oil salesman (and they abound)

I doubt you need an instructor bucket. SPC yes... Everyone needs SPC Instructor no. I'm guessing you've got decent mechanics already and an instructor (most instructors) will just try to cram you into his imperfect idea of perfection.

SPC = Statistical Process Control... Exactly where are you losing strokes... Putting? Short Game? Fairway misses? You see? SPC will tell you where your process needs refining. Gotta collect the data and be objective about it but... Once you know exactly where your weakness' are you will be able to do what Jack taught Jack (still the best ever): Fix yourself.

Anybody playing to a +1 and still looking for swing changes is looking to get worse... a lot worse... IMOP.