Costs for testing a cylinder?

[ChrisR67]

Hi

I have been thinking of getting a cylinder in readiness for getting a PCP later in the year. Could a few of you help me with some dumb questions?

* I was just wondering how much a shop will normally charge to test & certify an air cyclinder?
* When buying a cylinder is there anything I should look for, in terms of fittings or gauges that aren't compatible with air-gun kit? Or is anything compatible?
* Do these tanks need any special treatment when being transported? I know the valves shouldn't be knocked but are there any legal requirements for transporting them? I am just thinking of when I take it to be refilled etc.
* Can they be stored out in a cold/damp garage? I am thinking I'd feel safer with it out of the house and possibly locked down to a work bench or garage wall.



Also, does it matter whether the cylinder is 300 or 260 BAR?

Thanks
ChrisR.