I notice that most fields I go to use self fill stations and don't check hydro dates. I have played for 11 years and never seen an HPA tank fail in any way. When my tanks get a few months out of hydro I want to get them tested just to feel better. I worked at a fire protection company that did hydro and one of the old timers said he had never seen a paintball tank fail testing (besides physical damage to the carbon which automatically failed them), only fire extinguishers and bulk tanks.
Has anyone had a tank fail at their field?