hi all, anyone bother with this size? or do you just go to size X? in the past i've only used fluxed wire (home use) and recently at work i've been using the welder there and its using argoshield light, and i am really impressed with it. much nicer to use - less smoke and spatter. i've read that size PD will supply roughly 50mins of welding. is the baby bottle worth it, or should i just purchase a bigger one?