[mb6606]

Edz,

He is at the elbow plane at address and impact (red line) and at the turned shoulder plane at the end (black line)

That looks like a stock double plane shifter per TGM to me.

Exactly what a waste - HH must have a primitive knowledge of the inclined plane. Was he trying to get Tiger to match his impact shaft line to his setup shaft line? IMHO that would be a power/consistancy leak.