got 2 protanks2 and when i put either one on the evic the draw is comparable to sucking a really thick milkshake, which i like before, with a 2.5 ohm atty id be firing it up on auto mode for 6.3 seconds. then got into rbas and found my sweet spot. 1.2 ohms from 9 watts to 10.2 when i vape it says 2.5 seconds and i get tons of colder vape. now the protanks are just purely used as backup. 1 issue with loosening the protank is that the evics threads easily wear out. something i learned when building my rbas screwing them on and off all the time, one day i just noticed that they are wobbling now when i put them on, now i got to put them on snug and i try not to take it off unless i really have to. so just to warn you guys easy on the threads. dont even bother loosening the protank because you will end up messing the threads. protank on evics = sucking hard. get a vivi nova and make the air holes bigger, my vivi draws better on the evic