I've been rebuilding for a good few months now, and one thing that I just can't seem to come to a consensus on is how much cotton to use in the coil itself. I'm talking about the diameter of a cotton pad vs the ID of the coil (2.5mm/3mm are all I use). I only use RTA's that are single coil, where wicking even in the coil itself tends to matter a lot more than with dual coil/drippers. I was using Kendo gold but switched to pads (I own Muji and Puff/cotton labo) as it's far easier to stay consistent since you can measure in mm the amount you're using, which I much prefer. I hear a lot of people say 2x the ID of the coil which feels like too little to me, but then conflicting opinions say as tight as you can get but without moving the coil. At times I've thought that using more cotton reduces spitback, but this could be down to the nature of the coil or even the juice. I've noticed that using more cotton can prevent dry hits in small single 2.5mm contact coils, as they burn through juice so fast and any air pockets in the coil/cotton become more noticeable. Another aspect is the density of the cotton pad. I've noticed that muji is a lot more dense and feels tighter in the coil with the same size strip than puff/cotton labo. Muji also doesn't tend to fluff as cleanly and has a lot more white specks throughout the cotton. On another note - has anyone been able to establish a difference in taste between Muji and Puff? Basically I'm just looking for a consensus of opinions from people who have experience using these two cottons. And yes, I know I probably think too much about these things.