....here:
The single 4AA box is slim, but a little wider than the Puck. But I was happy to get everything down to one box and get a 3ml juice bottle inside as well.
The box has it's original switch as a kill switch, and a momentary switch installed for vaping. I used a 4xx E2 carto connector as a 510 battery connector (same threads-reverse function).
The tube on the e2 goes into the 3ml bottle directly through a modified dropper tip. A syringe tube drops in from the connector to the bottom of the bottle. This tube can be removed and a separate syringe used to refill from outside the box without removing the bottle - or bottles can be switched out.
I like stealth mode, but you could probably fit an led and resistor in the chaseway between the switches if you wanted to.
This box is streamlined a little without external tubes from a pump - just a cutout on the back for direct pressing the bottle with your thumb.
Thanks for looking.