[TubaMorg]

Sure I think I understand the configuration. Just make sure what terms you use, though. "Stored air" is only allowed in the 4 storage tanks at 120 psi. Static air in the cylinders is only allowed to be at 60 psi working pressure. So assuming you lock in air at the top and bottom of the cylinder piston, the top would have to be at 60 psi, with the bottom at a somewhat lower pressure (assuming no piston movement). To convert to sudden dynamic motion in the extend direction, you need to vent the air off the top of the piston as fast as possible. Doesn't the vent air need to pass through the tiny plumbing?

The last part of your post I'm not too clear about. Are you saying that you are considering using the air from one cylinder to feed air to a smaller cylinder? An interesting configuration that is legally debateable. You would, indeed, be storing air (energy) in this scenario. Even if it were legal, you are still moving air from one place to another via tiny plumbing which limits the mass flow rate of the system which limits how fast the cylinders will travel.

Of course, emperical evidence trumps all speculation. The cool thing about pneumatics is you can slap it together pretty quick and see if it works!