Why?
Because paying for a new set of cartridges every time you've used it up seemed a bit silly just to shave off a few grams, especially when it's possible to get multiple puncture in one day.
@edscoble started
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Because paying for a new set of cartridges every time you've used it up seemed a bit silly just to shave off a few grams, especially when it's possible to get multiple puncture in one day.