Wow that's cheap! They used to cost what, almost $40? I see they also have a new version now. I think I'm going to order some Samsung 20S for it, and Molicel P26A for regulated.
My coil builds were always very simple. Claptons were as fancy as I ever got. I think I did a few double coils but always just went back to a single Kanthal I forget what gauge maybe 5 wraps, around .5ohm. Is Steam Engine still the go to online calculator.