Hey everyone I just received an ehpro kfl+ v2. One question, there is a small black oring spare in the bag, the thing is I don't see it installed on the unit, where does it go? I don't know if I'm missing a part or if this is in the bag by mistake.
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It's likely the Oring for your fill port screw.
If your unit has an adjustable 510, there's gonna be one there too
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Too big, it's exactly the same size as the red orings around the drip tip
Must be the drip tip orings. 
Could be the inner top cap oring too. I don't know about EHPro
Could be the inner top cap oring too. I don't know about EHPro
That's what I thought too but it's too big for that, the ehpro doesn't seem to have one like my Russian does which is confusingMust be the drip tip orings.
Could be the inner top cap oring too. I don't know about EHPro
Yeah, who knows. They probably swept up some orings on the floor and threw them in your box. Never know what you're gonna get with clones.
Sounds like the O-ring that seals the top cap to the chimney, they are about the size of a drip tip o-ring but a little fatter.
Who wouldn't? But then when you have people get on this thread who have struggled for weeks and months getting their KFL to work right, it's easiest to just tell them to use more instead of less so they get less dry hits and more good hits so they are more happy and less frustrated. Eventually when there is more opportunity we can tell them to use a little less so they have even more success even though it doesn't seem right that using less gives them more...more or less.
What he said 1000 times over.....................
Sure you can play with it after you get the hang of it to fine tune it.... nobody is saying you can't.....much less room for error if you use more cotton
The coil was 5/64" I.D., so a tad under 2mm. I'd estimate the cotton was at least 2.5mm diameter after rolling, twisting and smoothing. It didn't go in easily.
I trimmed the tails to barely touch the juice deck, soaked them, pasted them into place and installed the chimney.
Thats pretty much my everyday setup without issues running at about 16 watts 2+ fills a day. The only word i would change " barely"...... i make sure the tails touch deck with a little extra
I only run about 12, sometimes 13 watts, 5mL per day. The rationale for trimming the tails to a minimum length is to allow the incoming juice to spread across the deck to all parts of the tails rather than have extra length lying along the deck and blocking the flow. Whether it actually does, or matters, I don't know.
Quite often I feel we over think these kayfuns. I and many others have found these to be pretty simple if enough wicking material is used. Baring a missing oring a burr or something like that if enough wicking material is used the kayfun should be trouble free
Truer words never spoken. When I got the first kayfun I was all nerves worrying about getting the coil and wick "just right". To my amazement, my first build worked flawlessly and I wrote it off to beginner luck. Well, the next one went fine as well, and the next and so on. I finally came to the conclusion that these devices were actually more forgiving than any prior device especially the Genny types.
Now that it is "OK" to use more cotton rebuilds can just about be done while paying full attention to the Oprah show or whatever else is droning away on the TV.......
Did that some time ago with same results. I re wicked 4 times with each time adding more cotton. The final amount was deforming coil to a point where I had to hold coil in place while pulling the densely twisted wick thru coil. Never a dry hit but muted cottony flavor as I increased. One thing that I got out of this was knowing that I couldn't obtain a dry hit from using to much cotton. With the more is better, or less is better theories, obviously a perfect amount is better but imo, i feel slightly more is better then slightly less at least with my wattages, vaping style, and juices. I have tried Slightly less and it just didn't seem as consistent as slightly more. Here again though my slightly less or more can be different to others description, so ultimately it's up to experimentation to find what works best for you
This is crazy true. 4 real deal kayfuns, and I never stress about wicking. Jam some random quantity of rayon in the micro coil, trim where it touches the threads as best as my bad eyes and shaky hands can manage. Trouble free.
Briefly, I neurosed over builds, but came to find other things in my life more interesting.
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Totally agree, if getting dry hits, not enough, if tasting like a dirty t shirt, too much. Those are the basics anyways.
My time with the R91 lead to the same conclusions. Slightly more is more forgiving, slightly less is very close to not enough.
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