So would it be correct that if the golfer at setup established the right forearm/PP#3 to align with the clubshaft/sweetspot then would this be one plane, clubshaft plane and sweetspot plane?
No. Unfortunately, the Right Forearm / #3 Pressure Point cannot simultaneouslyalign with both the Sweet Spot Plane and the Clubshaft Plane.This is because the design of the Clubhead includes both a SweetSpot (approximately in the center of the Clubface) and a Hosel (towhich the Clubshaft is attached). These two elements do not and cannotlie in the same Inclined Plane of Motion (given the traditional designwhere the Shaft and Hosel are located on the Heel of the Clubhead.
But not to worry. Per my recent post (Two Plane Lines / One Feel), thePlayer through Impact has only to Trace the Sweet Spot Plane Line with theRight Forearm and #3 Pressure Point, and the Clubshaft Plane Line automaticallywill be Traced by the Clubshaft itself.