[Leo M]

Unfortunately, I haven't been able to experiment as much as I would like to. This is just a concept. I thought I'd throw it out to the forum and see if anyone else could make something of it. There are a lot of other considerations in designing a system like this - what exactly is attached to the piston; how do static forces such as weight, or dynamic forces of parts in motion, affect the relative motion of the mechanism; how much time and money do you have to complete the system? The complicated nature is illustrated by the length of this thread. It holds some kind of fascination for us - I just know there is a way to solve this elegantly without violating rules, spending too much money, or needlessly complicating the circuit.

Maybe if we put check valves in the air supply lines to the solenoids???
Naaah - cuts off the regulator from the cylinder.

A good, hard problem - really fights back!