[12 piece bucket]

Very interesting - lets carry this tool further.
How about:
The angle is set to the angle at impact and there is no hinge until AFTER impact?
all movement is accomplished by the hinging of the right elbow and the ball join in the right shoulder.
a left wedge hinge is attatched at 90 deg. and there a hinge allows cocking and uncocking of the left wrist?
Again the left wedge is rotated on the ball joint of the left shoulder.
The wedges are maintained and the chapter 4 wrist RULES are maintained.
This places great responsibility on the shoulders for maintaining/ALLOWING the proper alignments of the wedges and the desired hinging. BUT, isn't that what the machine is all about?

HB

It's basically two rulers with a hinge sticking 'em together...so you can set fix however you want it....basically it just makes you keep everything working in the plane of the right forearm (no cocking or rolling to disrupt the rffw alignment) and the ruler has linkage to the torso ala 3rd edition elbow plane description...