in response to a couple of the posts i agree completely:
at the Masters, and every other event where HPAC supply the air, i have had my air systems date checked every time. Not only was it checked in the morning but i saw new bottles being stickered and checked later on in the day
You're very professional, and good (the best, in my experience, and the best known) at what you do, but are also nice guys: and thats something you dont always find.
and i liked the new fill station you had at Uttoxeter back in August
thanks Trev Tim and the rest of the crew