I have a few vivi they run hot if your pilling on them hard in quick puffs. mwdenko is right that's a good combo. That does seem way off however. I noticed that these vivi have a little troble seating right on the center pin. If fact I have had to pull the center pin back up on my mods, the ego types witch are smoov seem to be OK but the Vari vape, Tesla, and the MVP all have had troble with the center pins using Nova tanks. Just a thought. And I always try's to remember they stamped this stuff out like plastic spoons Qc is not a forte.