[Daryti]

This is my belief, like to hear everyone opinion.

5 Simple Key (5SK):
One of the founder, Chuck, was a GSED and what 5SK is doing is 100% based on TGM but expressing it in a different way (layman term).

5SK:
Station Head => Stationary Head of the 3 Essential;
Weight Forward => Lag of the 3 Imperiative;
Flat left wrist => Flat left wrist of the 3 Imperiative;
Diagonal Club path => Plane of the 3 Imperiative;
Club face control => Flat Left wrist, Chapter 4 and 5

5SK claims that they are not a pattern or a system but a must for a correct golf swing. I also found there are a not of similarity with Stack and Tilt on what they actually teach:

1. Flare both feet out;
2. Right hip slant up on the backswing;
3. Extension rotation and tilting on backswing;
4. Extension at impact, belt buckle up...

What I found in the book is it cover everything, but the "how" is sometimes lacking. For example, rotation shoulder but how? In the Stack and Tilt and 5SK, it explains that you need extension, rotation and tilting in order to get a stationary head and steep shoulder turn for the rotated shoulder turn. I also couldn't find these term (Extension, tilting etc) in the TGM but I believe somehow is cover somewhere.

Appreciate all comments to make it more understandable on the Golfing Machine.