Been there, done that. I designed and built 3 Alignment Learning Aids to teach players how to Hinge and use the Right Forearm Angle of Approach. Dual Horizontal, Angled and Dual Vertical. You need only two Dowels and a coupler to connect them (or use your Left Hand)
TO USE: Hold the "Paddle-Wheel" Stick Perpendicular to the Associated Plane with your Left Hand. With your Right Hand, Grip the Lever Stick at Impact Fix with your Right Forearm On-Plane and the #3 PP on the Aft Side of the Shaft. Move the "Lever" Stick back and forth with your Right Hand, Forearm and Elbow.
NOTE: Grip the Lever firmly with your Right Hand with a Bent and Level Wrist. Don't allow the right hand to rotate as you move back and forth. This is Hinge Action. If you loosen your Right Hand Grip and Allow the hand to Rotate while the Lever Stick moves, then you're Swiveling.
This teaches Hinge Action and the Right Forearm Angle of Approach for that Hinge Action(and much more). These devices will force you to Hinge through Impact and You CANNOT Swivel through Impact with these devices.
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