[Yoda]

I hope you can add some more insight to it. I bet Yoda either already had something like this, or is making one to see if it has any merit to use.

Naah . . . I just use a band of tubing to demonstrate the Straight Line Delivery Path of Thrust (Aiming Point / 6-E-2). I wrap the tube around the right hand (and the #3 Pressure Point / Right Index Finger) and then either stand (with my left foot) on the other end (not exactly the Aiming Point but students get the idea!) or anchor it under (a) the assisting student's foot (at the precise Aiming Point / Ball Location) or (b) under some similarly located heavy piece of equipment.

In the end, it's all to make a very big point:

The Right Arm -- always with the Pivot doing its job -- takes the Club Up Plane with a 'wind up' motion identical with throwing a ball. If you are an athlete who has thrown a million balls, you have a leg up. If not . . .

There is more to learn.