[Jeff]

Yodeli - thanks for commenting.

You seem to be implying that the hosel of the clubshaft is traveling in a straight line because the hosel (peripheral end of the clubshaft) traces a SPL. However, I believe that neither the hosel or the sweetspot of the clubface can ever travel in a straight line. The path must always be arced, and if the hosel is descending to its low point, then the first part of the divot (prior to the low point) must be arced (because the hosel is moving outwards and forwards and downwards).

Jeff.