I've sent you an email, FF. Personally I use an Aerox system, since 2003. I think the Mountain High kit has better fittings. I decided against using its electronic demand regulator because they confirmed (at Aero 2007) that it fails SHUT when the battery goes (despite others claiming otherwise). Currently I use Nelson mechanical demand regulators; they seem to work OK, but if I was doing it from scratch I would go for MH. The only thing I don't like about the basic MH kit is that their bottles don't appear to have the pressure gauge on the bottle valve so you can't tell how much is in some bottle you have just picked up.