I just made up my second batch of CO2 and it was a dud. Given the cost of
sugar/yeast/time, I'm seriously considering going bottled. Could someone
give me a heads up on renting vs. buying a cylinder and the best place to
get a regulator/refills. I was lurking over in rec.crafts.brewing and saw
three sources listed, Air-Liquide, Norwood Carbonation and Camcarb. Would
one of these be a likely suspect or is a fire extinguisher refill place
likely to be cheaper? Will a regulator fit a fire extinguisher? What about a
needle valve? Any ideas on cost?

TIA