...over on 'The Deco Stop' WWW site there is a recent/ongoing thread about PST tanks DOT 'exemption' being scheduled to 'expire May 2011. The thread is rather 'technical' and I'll admit i don't really understand all the details, however, the bottom line is that PST went out of business a few years ago, and so PST has failed to do the paperwork required by the DOT to maintain their 'exemption', thus it appears that after may 2011, all PST tanks will suddenly become 'illegal' for use in the USA and PST tank owners will be the proud owners of a bunch of very expensive windchimes ! I'm monitoring this subject personally as I own a total of 7 HP PST tanks, which represent a good $ 2500 worth of tanks, so I'm very nervous about the situation. I will say that. however much I like my PST tanks, I'd certainly NOT buy any more unless/until this 'exemption' issue is clarified/resolved !