Been thinking about a way to get a cheap buddy bottle for the field. I found a couple of 2900 psi output regulators at about $79, fill assemblies go for $70 and found several used tanks on ebay for about $80. So about $230. With shipping it will be over $260. Anyone else have any ideas on reducing this because I can get a new setup for $300 shipped. I couldn't find an unregulated valve which should knock off the price.