[AZ 67 C10]

Unless you are welding for a living i'd get a bottle that you can move easily especially if it isn't attached to your welding cart. I would rather make an extra trip to have it filled vs having to haul a 6' 100LB+ cylinder every few years to get it filled. I use a 80 and do a decent amount of welding, it gets filled about every other month. It might be enough to do your repairs at that size.