Another bit of news: I have made a 510 atomizer work in the BB. Kind of.
All of the 510 attys I have are of a length that requires two 510-to-510 adapters to fit in the BB's tank. Unfortunately that makes the whole assembly about 1~1.5 mm too long to fit into the BB itself.
With a Dremel cutting wheel and some patience I shaved a bit off the top of an IKV 3.5 ohm atty (after stuffing some paper towel into the atty first to keep the shavings out of the bridge and coil), being sure to keep the top flat and level. Smoothed the cut edges with a file. Fit-wise this worked great and atty fires up just fine.
One consideration is that the bottom of the atty is necessarily 1/3 of the way from the bottom of the tank. This means that while the tank will work great as a drip shield, any nicquid that overflows from atty to tank is stuck there. The atty won't be able to take it up again to keep the coil wet unless the tank becomes more than 1/3 full (which in this DIY hack increases the chance of a leak - see more below).
Another consideration is that the tank is sealed. Using sealed 510 adapters there is no air flow through the atomizer. This could probably be overcome by using unsealed adapters, but that would risk getting nicquid into the BB's body cavity if the atty is overfilled, rather bypassing the concept of the tank as a big drip shield. The air flow issue can be temporarily worked around by (gently) inserting a medium-gauge blunt needle tip through the fill port to prop it open. The problem with this, of course, is that the back plate cannot be closed.
Tomorrow I will probably take a look in the garage and see if I have an allen wrench small enough to take the face plate off of the tank and remove the nitrile ball and spring. That should provide plenty of air flow with the back plate installed, with the only risk being leaking if there is any nicquid in the tank and the BB gets carried at just the wrong angle.
If that works, I think a "dripping tank" would be a relatively easy DIY mod, provided one doesn't mind a) modifying an atomizer in such a way that it won't work with standard drip shields anymore, b) doesn't care that any nicquid that gets in the tank is basically "lost", and c) doesn't mind being careful with how the BB is carried.
If a dripping tank were to be offered as an purchased option, I think a couple of small design changes would be in order and probably quite do-able:
- First, a custom-length one-piece 510-510 adapter so the atomizer would not have to be cut to fit.
(FWIW, I considered suggesting some kind of built-in internal sleeve, but after thinking it over it would be tricky to provide both a seal and a ground connection in such a manner - plus that puts the atomizer connector outside the tank reducing or eliminating it's effectiveness as a drip shield.)
- Second, replacing the ball valve with something to act as close to a low-pressure one-way valve as possible (air gets in, nicquid doesn't get out) would do the trick to ensure it remains pocket- and purse-friendly without worrying too much about leaking due to the orientation of the BB. There are probably a couple of good ways to do this, but leaving the ball & spring out, making what is now the fill hole a bit smaller, and cutting the silicon gasket with a flap that covers that hole from the inside is the first idea that comes to mind.
That's it for my adventures with the BB today. Looking forward to hearing more from the new BB owners soon!