Here are my "dunce" questions. I have a kayfun v2.1 which I love. This last time that I built it, the vape is really harsh. Does that mean that my coil is in the wrong place or that my wicking is wrong. It has never been harsh before.
Also, I have a v4 that I bought and have never used. I tried to unscrew the 510 pin so I could get to the airflow controller and now, I can't get the 510 screw to go back in. Did I break something. I've tried for hours and the sucker will not go. I really want to use the v4 because I am really tired of not having top fill. (I'm becoming a true lazy vaper). The v4 has top fill the v2.1 does not. I tried buying the top fill caps for the v2 but when I go to fill all of the liquid comes out of the airflow hole, so I thought I would just go to the V4. Hmmm.
I have the mini v3, but it is only 19mm and I like the look of the 22mm (and the juice capacity) better. Any suggestions? I feel like such a dufus. Sigh.
May have had the coil too low, Pokes.
Also, any of the KFs can be top filled, not just the ones with the aftermarket cap.
Once the top is off, cover any air intakes with appropriately placed fingers. Fill. Start the top cap on. When it's a thread or so on, invert the KF and finish tightening the top, then return to upright portion and take a draw or so to re-establish the vacuum.
While I don't refill my v2s, that is how i fill my 3.1s.
Not sure what's going on with your V4. Maybe the insulator is a bit off kilter?