Up, down and sideways. I did another build today. 24ga 7 wraps, 2.5mm id dual. My ohm meter has taken a crap on me so I used my 2 eVics to get a reading. They only will show the 100th of an ohm and one showed .18 and the other .19. The xCube showed .21. So I tried it at .21 and it went to watts rather quickly. I tried 18.5. Same thing. The only setting I could get any length of time in TC mode was .17. Even at that it would still pop to wattage mode after a few pulls. Then it occurred to me. If TC is working at all, and I set temp to 200F, I should get little if any vapor. I got tons.At 200 it's sending a good bit of power to the coils. So I then began changing TCoR between the lowest of .0005 and .0015 in .00005 increments along a wattage range of the lowest it will allow you to set in SS mode, .163 and up to .215, each time testing at 200F. Each time I got plenty of vapor. So I've concluded that either my wire is not as labeled or the mod is malfunctioning in SS mode. Out of curiosity I strung up the TF-R1 with 26ga SS, 5 wraps. Tested again. This time it will stay in TC mode, but it doesn't function properly. I again played with watts (left TCoR alone and yes, was in SC mode) and while it was indeed vaping, I could never get it to properly work in TC mode as Ti does. Now I got both the 24 and 26ga wire from the same source. I think I need to find another source for SS wire and retry this in order to rule out wire and point toward the mod. My gut is telling me its the wire.