Pneumatics Air Usage Questions

I have a couple questions about the air usage of a pneumatics system. When the solenoid allows air through, it runs through the hose and fills the piston. when it releases, it vents all of the air that just ran through it. So, theoretically, wouldn’t you use less air by having the solenoid as close to the cylinder as possible? Second question is, if the amount of expansion of the cylinder allowed by the mechanism it’s on is limited, then the less the cylinder expands with each actuation the less air it uses, right? I may be completely off base as this is my first year using pneumatics, but I thought I should ask. Any help is appreciated.

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yes, that’s accurate.

also correct, since you’re limited the amount of space for air to pressurize.