A Russian 91% clone is my daily atomizer. I use tobecco and it works fine, I have heard ehpro is nicer.
A simple microcoil that should work for the kayfun/Russian and mvp combo is 12 wraps of 28a kanthal a1 on an 18ga needle. Install it with the needle still in the coil, slide the needle out. Pulse fire it, squeeze with tweezers, repeat until it glows from the inside out. Should look like a tube with no gaps when you get done. Tests out around 1.4 - 1.5 Ohms. Make sure your wire from the short block (neg terminal) does not touch the big block (positive terminal). Roll a wick from cotton the size of the id of your coil between your hands by gently rolling it back and forth and pulling it a little to get the right thickness and density. Twist the end into a point for threading it through the coil. You want it loose enough in the coil so it slides through without hanging up, but make good contact with the walls. Dont roll it so tight that it feels like a rope, more like the way a piece of yarn feels in between the fingers. Slide your wick in so you have about an inch from each side then trim it. Hold the ends up, put the through the chimney tube, screw on chimney, tuck wick into the sections above juice channels. Dont pack it in be gentle. Prime with juice, test fire, assemble, fill, and vape. Once you do it a few time you can easily build one in less than 5 minutes including dissasembly/install/wicking/reassembly/filling. Sounds complicated, but its not hard, just takes a little practice.
Oh yeah I forgot to mention, I use cvs sterile 100% rolled cotton and it works great.
I hope you enjoy your new kayfun.
