I'm looking on ebay at regulators and since they're so common in hydroponics and brewing theres a lot to choose from. (I even found one for $40 with free shipping, no solenoid)
I don't understand how to tell what sizes the connections are on the regulator, do I need to figure out what it takes for bottle attachments and outlet? are these something easily adapted or changed? (finding adapters can be a total pita in my experience)
what considerations need to be made for a regulator?