rebuild kit came, was going to replace all o-rings but seemed unnecessary once i started tearing everything apart, I replaced o-ring #16 and haven't leaked so far but its only been a few minutes, I get some juice leaking but its very minor, at least its not pouring out like before. Will update tomorrow or so if anything has changed.
Ordered cotton from fasttech at same time i ordered kayfun, the kayfun came two weeks ago and fasttech is telling me to keep waiting

I have some kanthal wire but no cotton, still vaping the original coil that came with kayfun kit
edit: leaking more than i would like to but not pouring out like before, going to try to order o-ring #16 but bigger, like i this vid
2nd edit: refilled kayfun now its leaking again but in between part 3 and 5, damn thing giving me headache