So I finally have a minute to spare for writting something about this little device.
I'm using it topped with an Igo-L and Igo-S.
It is LITTLE. In 18350 mode it is hidden by my hand pretty much, and I don't have very large hands. True stealth vape if that's something you've been looking for! I'm still getting used to it, lol...went from an eVic, to the lightsabre VAMO, to the Natural, then my PAPS. Its 18650 mode is far more natural feeling to me so far, but I'm starting to love the smaller 350 setup for some reason...I can't explain it, heh.
The bottom button...my first bottom button device, and well, I can see it becoming a problem. I wish there was some type of 'guard' so you could set it down while unlocked and it wouldn't fire. Granted, it's a simple flick of your two fingers to engage/disengage the lock (very easy), I can totally see myself setting it down, or passing out with it, while I'm indulging in some drinks a little too much.

Maybe it's just something I will get used to over time.
I took perseas' advice and tightened on the bottom first, then screwing on the top, and it has fixed my problem of unscrewing the bottom cap while engaging/disengaging the button lock. THANK YOU! I still think I don't have it set up perfect though. The actual button spins while everything is together, and I don't know if it is supposed to. I have the nut in the switch tightened all the way but it's not 'locked' in place, the entire button assembly spins inside of the bottom cap unit. Not a problem I must say, but it feels like it shouldn't do this?
All in all, BEAUTIFUL little device...I'm quickly falling in love with it. Perseas and crew, two huge thumbs up on you alls work! I still need to fiddle with it some to get it perfect, but this PAPS is awesome, and your company's customer service is incredible. A+ work...keep it up and you're destined for a bright future!