Does anyone know of a place that will refill 2 1/2 pound co2 bottle? Would really like to fill with nitrogen but no one seams to do it. Ive tried Air-gas and Harris. Air-gas has to order and will take up to a week. Harris wants to exchange my nice, clean, new bottles for there old, ugly and dingy ones. Its like pulling teeth getting them to fill mine. I never thought I would have such a hard time getting these things filled. Ive also heard of people filling there own off a bigger co2 bottle. Anyone doing this? Could you give me some incite on how to do this?