I've had the FakeSkull for about a week. Had to put a nylon washer under the head of the feeder screw to get it to make contact with my Stumpy. Couldn't get it to feed worth a crap, and the tube came off the feeder screw when I took the bottle out to fill it. I put a little cable tie on it, and it not only keeps the tube on but it squonks OK. Seems it was leaking air out the connection instead of pushing liquid up. Definitely could use a softer bottle though.
Update: I put an Italian SuperSoft 8.5ml bottle on it and it squonks beautifully. Due to the small size of the feeder screw I thought it would leak, but to my surprise, it doesn't. I just pull the tube and all right off to fill it and it slides right back on like it was meant to work that way.
I tend to keep one atty on a mod, so the 510 is no problem, just a simple washer and I'm done. It's mated to a Derringer with a POM top and tip now, short and featherlight. I'm not a fan of the square box, side squonk set up, but the thing is so small and light that it more than makes up for that. Whatever that "Chinesium" is, the conductivity is good enough that I can run a battery down further than on my Coppervapes and still get a good hit. Yeah, silver would be better, but not worth the effort to me.
The only thing I really dislike is the silly punk skull design. If I ever have problems with it flaking, I might sand and Bondo that crap off. I'm really don't like cloners stealing the artwork, except for the Cherry Bomber, in which case it's kind of hilarious.