So it would be better to splash out and get a air tank then?
Unrelated to the original question in this thread, but:
In the context of this thread co2 can be best in certain circumstances
Air is the operating system of choice for all current markers (with the exception of 12 gram powered co2 pistols, which benefit from air anyway)
There is little point buying a system that you cannot get filled.
If you play at the few sites that only run co2, then use their cylinders or buy a co2 cylinder
Otherwise buy an air system, but don't splash out.
Save your money to buy paint and get an aluminium / steel cylinder at about £30-40
This is the best value for money compared to a fibre system at about £150