So I have some questions for you guys. Love the Vivi Novas. I've been using them with a Lavatube with great success....until I tried the 2.8 ohm heads. I didn't realize until I was putting them on that they are a different type of wick than the wicks on the low a standard resistance heads. The material doesn't seem to wick as well, even after unbraiding the wicks. Are they an older version of the heads? Newer version? Will you be carrying high resistance replacement heads that have the 4 thin, long wicks like the low and mediums do?