I don't have the VT. However, inaccurate reading can be caused by the 510 connection on the mod being "dirty". As a regular maintenance, you should clean those contacts from time to time. I usually do that with 90% isopropyl alcohol and a q-tip. I usually wet one side of the q-tip with alcohol, clean the 510 connection, dry with the other side. Let it sit for a Minute, just to make sure, if there's any alcohol somewhere, it will evaporate.Are they known to not read the atomizer resistance correct? My reads it if the coil is 1.8 it reads it at 1.9 and sometimes 2.0 I don't like that.