Suppose you have a long distance you need to fill between the front of a plunger tube and the back of a barrel. Like, you're making a Kenner 95 Crossbow to the original configuration with the barrel on top. Sure, that's a lot of dead space, but you're gonna try it anyway.
...how would you actually do that, anyway? What kind of tubing? What kind of material? How big?
you would need to find a way to balance out between having too much dead space and too much airflow, so you would need to test this one yourself to find out honestly, there's no right answer