[12 piece bucket]

This is just an extremely picky point (I've been guilty of saying this too because it does make explaining it far easier without the extra layer of complexity). But think it is educational....

There are three plane lines - impact point plane line, the ground plane line (my terminology) and low point plane line. Whilst these lines run on a parallel to the intersection that the ground plane makes into the inclined plane - the impact point plane line is not actually on the ground - it runs through the desired sweetspot orbit at impact which should be very slightly above the ground. More Loft = closer to ground, Less Loft = higher above ground....

The plane shifts around the impact point plane line and as such the ground plane line and the low point plane line will change accordingly even if just very slightly.

Very good point and good post!

I think another interesting Plane Line to discuss would be the Separation Point Plane Line. The point of impact is of course important but doesn't take precidence over the position of the clubface at separation.