Hey marc, I hear ya on the JFC for sure. When I first got mine, and it being my FIRST with a JFC, I inadvertently dumped my first tank full, then the next ½ tank, after that I got it right. The trick is to not get the top cap screwed down onto the tank too tightly, for me anyways, and, I had to learn how to handle the Hussar a bit differently, as in picking it up or putting it into my carpenters pants leg pockets when on my HΩ Slice.
Just got mine in yesterday from my 2F purchase.
For a good amount of change (aournd $30+ with all parts) my only complaints on the quality are the o-rings. They are cheap and flimsy, like the old joke though their are plenty of them LOL, IOW comes with good amount of spares. But I'll be replacing with better quality.
Love the 510 adjustable so can put on a hybrid if like. The airhole was easy to put in the 1.3. Looks killer IMO.
The build and wick was about as simple as can be (I went 28 g kanthal, spaced, coming out to 1.2 ish).
Still haven't figured out the dang JFC, gonna have to play around with it once I'm done with this tank, because I'm still not sure I'm doing it right. Hoping not to dump a tank LOL.
All in all not a bad rig, but a bit more faff that I would prefer, for instance compare to the SXK DoggyStyle, which is zero faff but doesn't have as many moving parts.
But these are initial thoughts and may grow to really love it after fiddling about.