Your mothers suggestions for next build.

[your mother]

This has probably been discussed before, but I think that it'd be only fair if the small 12-grams CO2 would load faster than it's bigger counterparts.

In real paintball there's normally some sort of speed change ability for small co2s and you only have to twist a button about 1-2 twists...

[jitspoe]

The way changing is currently set up, you don't have to be holding the CO2 until the changing is complete.  I typically start changing my co2 when I see a larger bottle in the distance, and by the time I pick it up, the change is complete.  What should happen if you start changing CO2 with just the 12g, then pick up a 20oz mid-change?