I got a mini vivi nova and 3 2.4 ohm replacement heads and am useing it on a vamo. The 2.4 that it came with died and put in a new one omg the flavor was awfull!!! The one it came with had great flavor i made it through about a half a tank and couldent take it anymore and took that head out.Was weird the ohms said it was 3.2 ohms it was stamped 2.4 anyway the second one started out reading 3.0 ohms and dropped down to 2.5 ohms after i vaped awhile. With the second head i have very muted flavor no matter where i set it at. I tryed fluffing up the wicks and have ran about 3 fills through it now and still blah flavor. So am wondering if i just got some bad heads or what? Will be so glad when my new ibtank shows up this week 