Tracing a Straight Plane Line

[spmurph]

Is this still a valid concept? I know the forum doesn't discuss planes much anymore. Just curious if this concept was blown up by science or if it is still being used.

 

[tongzilla]

I think it's an ok concept for a beginner to have an awareness of where their club is throughout the swing, so they don't have a completely whacky out of position swing.

But as a precise concept, like I see some people using a laser beam...not a good idea. Much better idea to just zero out your swing (i.e. zero out trackman).