I cant speak about the other clones,but i have 2 tobeco v1's and have had no issues at all.I have a v4 coming in a few days,and if needed i will post pics of the wick setup i have been using.I use rayon instead of cotton,but get great flavor,vapor production,and no leaks even if they lay on their side.That video looks like an interesting way to do it as well,but i prefer the simple approach.After pulling the wick through the coil,cut each side so it looks like a bowtie,then split each side,take about a 1/3 of the bottom half,and run it into the channels,less than half way down,then trim the rest of the wick about 1/8" from the coil.Perfect every time that way,may be different with cotton though.