i have decided to use disposible bottles for my new tig setup as i dont want another full size bottle hanging about. basically i have a bought a small disposible regulator but i have no flow meter. first of can you even get them to go with the small disposible regs? and secondly do i really need one, i have always had them on big setups at work but is it really necessary for my little one at home? also this is gonna sound stupid but as the little regs have no gauges how are you sure you are getting the right pressure?