I just done mine using v2 bacon, not really a cotton I like but I had some that needed using, the way I cut it is fantastic, start from the bottom and cut at an angle and then tuck the tails in ,looks so tidy and you have the advantage of the wicking being full and not cut to make a shoulder, my unity is working superb thanks to the guy at the vape shop who suggested it, I'd have never thought to reverse the cut angle and then pull the cotton down and tuck in without the advice I received, lesson learned and thanks to the vape shop guy who suggested it