Just got my Kayfun Lite + in the mail. Sadly only 3 of the 7 packages I have in transit arrived, those where my Big Willie's Custard order, my Mt Baker order and the KFL+. For the record I got it from VapeRev and they sent a baggie of spares.
First of all here is a curious little detail that I didn't see anywhere else regarding the KFL+:
There are screw holes like that on both sides of the positive terminal post! This will likely come in handy for dual coil builds!
Just finished putting the same build in it as I have in my KFL (1.6ohm 30awg 8 wrap 1.5mm ID vertical coil touching the air hole) so that I could compare them head to head. With the air control opened up all the way (until the head of the screw is flush with the base) I feel the draw is identical to the standard KFL. Its only when I unscrew it further that I get an airier draw. Luckily with the Fusions Mods hybrid adapter I can expose a thread or two of the air control set screw and then pin it down with the adapter if I want an airier draw. One nice thing I noticed is that if I tighten the air control a bit I get a pretty noticeable flavor boost from the vape witch is nice for when I want flavor over vapor volume.
Another thing of note is that I can still use the nipple tip on my bottles to fill it up with the new deeper fill hole but not without a little leakage from around the nipple because the nipple goes in so far that the edge of the bottle's mouth rests on the 510 connection forcing the bottle to be a little sideways. Haven't tried to empty it yet with the same bottle squeeze method I've been using on the KFL just yet, I suspect it should work alright unless the nipple isn't making a full seal on the inside of the fill hole. If it isn't I suspect I might make a pretty bad mess trying to empty it this same way. I might have to get some blunt tip bottle caps for this. Oh well..
And my final note is that, judging from pictures I was thinking the base ring was a bit taller than the standard KFL by maybe 1mm or 2mm making the whole thing taller. To my relief this is not the case. The base ring is exactly the same height so the entire device is identical in every other way.
Frankly I'm not sure if I like it more than the standard KFL, I never had a leakage problem with the fill hole on the KFL and I liked that beveled screw hole to use with my bottle nipples, that one is a bit of a downer for me. And the whole air control I see myself just leaving it wide open for the most part.