I just received my vivi nova 3.5 ml along with my 510 thread for the ecab. I do not really care if you think the ecab sucks. I love it, I hate the bigger ecigs and will not use them. I am not new to ecigs, but I am new to the vivi nova. I filled it once and it worked perfectly, better than using those ego c attys. But when I went to fill it I took the rubber piece of the top because I wondered what it was. I then put it back on and filled it up and now I get no vapor at all. The battery is not dead, I have changed the battery to make sure and I also checked the old way with the ego c atty and the plastic tank for the ecab. When I went back to the original setup it worked fine. I do not know anything about the vivi nova so I dont know what I did wrong, came with zero instructions so if I ever wanted to change the atty I probably could not put it back together. Any help with this would be much appreciated.