Kegconnection has a 2 keg and 20oz Paintball co2 tank for sale, its like 180 bucks. I was thinking about getting this but what are the draw backs of such a smaller tank, compared to a 5lb tank. Will I just be refilling it more often. What if I carb with prining sugar in the corny will that help with the refills. Would I just be better off getting the 5lb tank? Thanks for all the help!