I'm a Denver native, and its nice to see a "local" vendor here. On topic: I use the LR ego -T "B" tanks. Much better performance/use than the 'a' setup. 2 ml capacity.
Been vaping the ego-t setup after some seriously bad experiences with the new cut-carto tanks. (I drive a taxi in Denver).
I drip/carto and ego-t and like all three methods, especially the ego-t tank for "on the go". My gear has only had one leak in a month, and that was due to the main reason that ALL ego tanks will leak...the cap gets loose/deformed. The solution is the new silicone caps that are out for both the "a" and "b" gear. (see cignot.com).
Off topic, I'm not sure I'd ever buy from you though with the prices you have up. ego basic kit is 74 bucks? Thats 30 dollars higher than most other sites, and even AFTER shipping that's 25 more than I paid for my kit. 40 bucks for 510 kits with just 2 bats n/ attys? You need to look at cignot, altsmoke, hoosierecigsupply, etc., etc., and see what the market is doing. Even a comparable Volt kit is 29$ on most sites.