Well, I'll ask it here, but it's kinda speciality so I may give it a day and then ask in a more appropriate place...
Have successfully used a Mutation X V4 built for TC and a Kanger Plus with NI coils on an IPV4. On Friday I received the new VAir-T Ni coils for the Atlantis V2. Put them in the Atlantis, sat it on the IPV4 and after 1 second or so got a "Short" message. All 5 of the coils did the same thing. However, they fired fine on a SMOK 80 in the temp mode (I know about the SMOK 80 not really being temp controlled) and, as of last night when I got it, on a Snow Wolf 200.
So, the problem appears to be limited to the IPV4. I saw someone in the Temp Control section talking about exactly this issue and saying something about either tightening down the coils more or adjusting the 510 pin. I tried both with no change. I was wondering if the adjustment to the pin was mostly out or mostly in. In either case it's as clean as I can make it and whether adjusted until the Atlantis doesn't even quite touch the unit or adjusted until the pin almost doesn't touch the Atlantis post I get the same problem. For now I'm just using the Snow Wolf to fire it.