I have two Sophias, one in a 35 mm IBTanked and the other in a 45 mm IBTanked. The former has a ByLeo STR5 drip tip on top and the latter a STR15 above the 45 mm tank. In them, I use cotton-wicked 1/16" micro coils made of Stormy's Vapor Cellar inexpensive NR-R-NR ready wires (1.8, 1.5, and 1.2Ω...