I did a 26 gauge, 12 spaced wrap on 2mm id on the Billow V2 and when I Locked my resistance in at 0.07ohm, the temp control was working great and i had no issues on my VT. I took the ego One tank off and it is just sitting there and not using it. I don't know if i did something wrong but i didn't enjoy the 2 stock coils that came with it. i just couldn't get the temp right with that tank. With the Billow V2 i have no issues at all.