Oh, now you've got me all excited (about vaping). Luckily, I've only spend about $250 on PVs in my 1+ year of vaping, one 510 starter kit, then two Riva 510s and just recently an eGo-C kit. So this is my first "mod", my first "vv" and my first over 3.7v PV. I do have an empty tank, but it's just...