I dont think that it was meant to be taken as a "must" I think what he was trying to convey is that a little goes a long way, and that if your coil, be it whatever one's preference, small, narrow, large or wide, that it should fit , not too snug or too loose. I gather what he means is if its too tight, there is a point where its hindering the flow and you end up with a filter effect , where your juice is being filtered thru and you get a taste.
On his atty, because its a bottom feed , you dont need much legs/ or tails as it goes directly to the coil and wick and doesnt need legs to pull it up.
I have plans to try out the cotton later on this evening, and I will try not too get too much on but enough to get it where it needs to go in the KFL and on my little Fatty V2.