let's start with the easy part,...a mech mod. I've been building sub ohm dual coil RDA setups with my trusty ohm meter and SteamEngine.org as my guide. I meticulously rotate two married sets of VTC-4s for my Sig 150, and I now feel ready to experience and maintain a mech mod. I'd prefer an 18650 build and with so many choices I am hearing horror stories of really crappy clones. Anyone got suggestions on what to buy under $100 ?