The right forearm is only on the inclined plane at the exact point of impact.....
The right forearm is below the inclined plane at the top of the backstroke....
The right forearm is above the inclined plane at followthrough....
Therefore, The right forearm has a crossline motion through impact....
Therefore, The right forearm and clubshaft (or more accurately the LCOG) will not both be on the inclined plane (the LCOG will but the forearm won't) at the point that those pictures show. They are onplane relative to their own plane, the plane of the right wrist bend - the right flying wedge...
The right forearm is only on the inclined plane at the exact point of impact.....
The right forearm is below the inclined plane at the top of the backstroke....
The right forearm is above the inclined plane at followthrough....
Therefore, The right forearm has a crossline motion through impact....
Therefore, The right forearm and clubshaft (or more accurately the LCOG) will not both be on the inclined plane (the LCOG will but the forearm won't) at the point that those pictures show. They are onplane relative to their own plane, the plane of the right wrist bend - the right flying wedge...
An expansion upon the points raised here could lead to a lot of understand of the principles of the Golfing Machine.