I have at least a couple of those atmizoo devices, but they came to me in bundles and trades. Is there a quick way to tell which are for
nautilus and which are for BVC?
Assuming that your atmizoo device you have has a base that screws onto the threads of the coil head (like in the 1st video in this thread,
see video at 1:48)...
A regular BVC/BDC coil head has a 510 thread at it's base (it's not truly 510 but extremely close) whereas a Nautilus BVC coil head has a wider thread than a 510, about 2 times wider or so.
I'm sure you probably have at least one 510 tank laying around. If the base of your atmizoo threads onto a 510 tank's 510 threaded base, then you know you likely have the non-nautilus BDC/BVC version that OP is looking for. If the base of your atmizoo device is too wide to thread a 510 tank into, you know you have the Nautilus version.