So I just got an ego c twist in the mail on thursday and I've been using the same protank 2 that I was using on my older ego type model. It vapes fantastic the only problem is the liquid is disappearing quicker than I can seem to vape it! Like last night I left the house and filled the e cig up about 3/4ths with liquid and then 45 minutes later I'm looking down at my e cig and its 1/5th full! It isn't sticky or slimy like if it were leaking and I'm not vaping enough for it to disappear that fast! This happened every night since I got it. I'm vaping it at about 4.0 volts (any lower isn't strong enough, any higher tastes burnt) on a 1.8 ohm head.