I dove headfirst into RBA's last week with an AGA-T2 and an A7 RDA from empiremods. I wanted to play with silica first, because I had a bunch of it on hand, and threw a horizontal "U wick" on the AGA-T2 made out of 2mm silica and a 4/3 wrap of 34 gauge kanthal A1. Gave me a rock steady resistance of 2.1, vaped like a beast, but the wick couldn't keep up after the first couple of really good blasts on it. I'll probably try a 3mm silica in it after my 30 and 32 gauge wire shows up. Tore the 2mm out of it and whipped up my first SS wick with the included stuff. Immediately blew the coil I made. Went back to the drawing board with the 34 gauge stuff i have. Tinkered with it for HOURS yesterday but finally got a solid cooking 2.0 ohm SS coil to work. I rolled the SS wick solid and am now thinking maybe a "straw" type would wick better. I get good vape from it but it still feels very airy and light unless I do several good primer puffs on it. ~shrug~
On the other hand the A7 is a beauty! I disassembled the whole thing, gave it a thorough vodka bath followed by a soapy water + clean water rinse, dried it thoroughly and gave the factory wick a shot. It's not perfect, by any means... too airy at first so I broke the tip off a round toothpick in one of the holes. That helped but now it whistles like one of my old stardust clearos... maybe worse! The center post is relatively loose and I have to basically adjust it each time before I screw it back on a battery. BUT after I tossed the OEM wick I quickly twisted up a 4/3 of that same 34 gauge kanthal around some 2mm silica and had the thing fired up in less than 10 minutes, from start to finish. As tiny as it is I can't imagine an easier device to make a perfect wick for. A rock solid 1.6 ohms! HOLY SMOKES BATMAN! This thing ROCKS! So far I can get maybe 6-8 drops of juice in it but the vapor it produces is fantastic! I want to tinker more with my AGA-T2 but so far this A7 gets way more of my attention... I simply love it. I see three or four more of these in my future, when I find them on sale somewhere. Easy to swap out juice that way.