I would love to be able to make 5 v box mods. I have smoking friends I'd like to "gift" with these, maybe just for the cost of the materials. The 5v box mod vapes like a dream. I've been passing mine around letting everyone get a draw on it and that's about all it took for them to want to put those analogs down for good. The tutorials at Madvapes are pretty good, although mine has the batteries next to each other with the wiring at the edge of the box. Would make no difference to me either way, but I have no complaints about the one I have. That 5 volts certainly is a "sweet spot" for vaping.