I redid one of my 8 today. Microcoil and 2mm ecowool. Took 10 min and vapes like a charm. Sucks having to run without the air screw and having to tilt, but to me the vape is far superior to Kaynotfun. I have 3. Kf 3.1, KFL and Russian 91. They vape great, good TH, excellent vapor but they just seem to taste odd. I tried boiled cotton, silica, ecowool. I just don't like them.
What I was impressed with was a protank mini I setup with an atom mod for a buddy getting into vaping. I liked the protank so much, I ordered 5 of the standard size ones. I don't know if the reliability will be as good as my AGA's with the Protanks, but IMO, Kayfun tops suck.
3 out of the 8 have micro coil with 2mm ecowool. One has a micro coil with cotton. The others have SS mesh with 28g kanthal between 1.2 and 1.5 ohms. I never touch the coil or the wick. I build them and forget it and just vape them. I discovered the cigarette paper method and I can wind a coil on a genny in about 5 min or less. If they gunk up, I drain the tank, run them under hot water, do a dry burn and all set. Sometimes I even pull out the wick, dry burn, clean and torch the wick, reinsert, adjust a tad and it's good for another 2 months. I have spent about 30+ hours at least learning how to build these. Now I figure I can build anything.