[MizunoJoe]

I've been talking about hand paths in the context of the Turned Shoulder Plane because it's the most common, but let's look at the Turning SP - the version with vertical moving arms. Homer says the hands trace a line on the ground INSIDE the base line, so in this case, the hand path NEVER lies in the Swing Plane, unlike the Turned SP in which the hands trace the baseline from the Top.