Ok, I wanted to be one of the cool guys and got a Lincoln 135a mig and want to start welding. My question is - for the average home user how big of a bottle should I get? I've called a local gas supplier and they suggested either a 40cu ft or an 80cu ft. How long do these typically last? All I plan on doing is stuff like a steering brace, maybe some weld on sliders, etc.. 





took it back on monday and got the biggest bottle they sold which is around 180ish.