[chbkk]

chbkk

I can see your two images.

However, I have no idea what you are trying to demonstrate.

A golfer doesn't stand with the left arm in-line with the clubshaft or COM at address.

Jeff.

Jeff.

I am trying to illustrate the 2 mental experiments on a swing machine like an Iron Byron.

Image 1 for experiment 1: Swing with the clubshaft on plane.
Image 2 for experiment 2: Swing with the sweetspot on plane.

Experiment 1, we may break the mechanical wrist joint from the stress of the COM of the golf club trying to move on plane.

Experiment 2, will work out fine.