I don't get why I'd want to own my own tank(s). There has to be a reason, but I'm failing to see it. Right now, I go to my LDS, rent the tanks, bring them back. Its two trips to the shop. If I buy tanks, I still have to bring them to the LDS to fill them (and then I need to wait for them to fill them), so I save one trip to the LDS, but then I need to add regular inspections. It seems like it isn't worth it, especially if you fly somewhere where you are likely to rent tanks (and weights)... but I must be missing reasons that you all prefer to own your own tanks -- so fill me in! Is it because you really want a very specific tank material, size etc. and can't usually get them at the shop? Are you obsessed about making sure nobody touches your stuff? What is your reason?