[tongzilla]

If the Hands are a portion of the Lever Assembly and they do not move in a circle as your 'proof positive' demonstrates, haven't you negated 1-L-8 and 1-L-9?

1-L-8. No portion of the Lever Assembly can swing forward independently.
1-L-9. Regardless of how the Lever Assembly is driven, it moves in a circle.

The Hands move in a straight line for only a brief period, whilst the Lever Assembly (the whole of Left Arm and Club) moves in a circle around the left shoulder socket.

How can the Hands move in a straight line but the Lever Assembly move in a circle simulatenously? The answer is the Axis Tilt during Start Down performed with a Stationary Head and Hip Slide towards your selected Delivery Line.