I don't see one of these passing UK customs' X-Rays, even if disassembled :cryyy:
Looks amazing, only comment is that it needs to be a bit thicker in the middle. From an electronics perspective, any chance you can make it so that it can take 1x 18650, or so that the CR123s could be in parallel? That's quite important for people looking to make high-efficiency lasers, because the LavaDrive won't take over 6v.
Oh, another idea, if you were to buy a bag of Polymorph beads, you could mould the handle or sell the polymorph, so people could fit the handle to their own hands. It is an insulator, however so I'm not sure how useful you'd find it thermally.