Regardless of where the Clubshaft and Clubhead are joined together, it always feels as if they are joined at the Sweet Spot – the longitudinal center of gravity, the line of the pull of Centrifugal Force. So there is a “Clubshaft” Plane and a “Sweet Spot,” or “Swing”, Plane. But herein, unless otherwise noted, “Plane Angle” and “Plane Line” always refer to the Center of Gravity application. Study 2-N. Expect during Impact, the Clubshaft can travel on, or to- and – from, either Plane because the Clubshaft rotation must be around the Sweet Spot – not vice versa. So Clubhead “Feel” is Clubhead Lag Pressure (6-C) and is a Golfing Imperative. (2-0). If Lag Pressure is lost the Hands tend to start the hosel (instead of the Sweet Spot) toward Impact – that mysterious “Shank.” When in doubt, “Turn” the Clubface so both the Clubshaft and Sweet Spot will be on the same plane at Start Down. Both Planes always pass through the Lag Pressure Point. Study 6-C-2-A.
The sweetspot doesn't turn or rotate is is orbiting in a circle on the inclined plane...the shaft rotates and orbits around the sweetspot plane pending hinge action and/or wrist action..
Let's see...
The earth orbits the sun ...sweetspot orbits around the left shoulder and its hinge assembly with angular motion...
The moon orbits around the earth....the shaft orbits around the sweetspot...BUT...Because of the contructionof the club if the shaft orbits too much one way or the other(clockwise or counterclockwise) you get a nice gift....A Shank!!!!