[dlam]

You can probably get close with a combination of reverse pivot and a flip release.

With form III you get help fro CF to keep the lever straight. That is a precondition for transmission of energy from the force to the moving mass. With form I the hinge will prevent proper transmission of force to the other side of the fulcrum.

That is very true Bernt,
A special shot like a flop shot might be good for class I.
There is no control over the speed of the clubhead with class I
A single class III lever type shot has more speed control more effective for the short game.