What I want in a dive shop.

[arcFlash]

I'll accept that a store can't have everything but there is little reason to not "try before you buy".

How about this, no gas fill station, You lease the fill station! Make it a small pump and a 3 tank bank that runs on a 15 amp service and on a cart. Maintenance program is linked into your internet via wifi and the service truck comes by and replaces your filter and whatever.... (I'm guessing as I don't know jack about a fill station, sep that a compressor is way too $$$$) but the idea is correct. You lease the hardware and the 'air' is free.

If they can make a laptop for under $200 for developing countries they can make a compressor that's affordable. The banks will last for a hundred years if maintained so that's easy to cover. (post on TheDecoStop listed 1890 as a hydro date for some O2 tanks)

I get that they need to make money but cutting cost cuts more then fixed cost. I can't list all the times I wanted something and didn't buy because I couldn't try is right then. Take air cell and BP's. They must have 20 cuts/sizes all at ~$250. How many CAN I use and how many CAN I buy? I think I can own 2 more then I own but I have 2 I don't want so the LDS made the same money but didn't help me. Not their fault but it's not mine ether.

Ultimately, get me gear that works like a fish and only pulls the O out that I need without all the complexities of mixed gas and tox limits.