Thanks for the interest guys, I've updated the list!
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Something I'd like to ask is that everyone is gentle when tightening the tailcaps. There is no "stop ledge" inside the body like on most lights. There is simply no room for one in the current design: the threads would need changed, the o-ring would need resized, the body made wider and the whole thing re-machined and re-tested.
I'm mentioning it because one of my early hand-machined units encountered an issue with this a few days ago. The batteries put pressure on the PCB, which put pressure on the suspension wires and caused them to twist. I'm using a new half-height wire design now that will minimize twisting but with enough pressure on the PCB they will still bend side-to-side (which is undesirable).
These Run #1 units have a finer thread pitch (32 TPI up from 24) and are using the aforementioned half-height suspension wires. Chris' machining is absolutely top-notch and the threads are like butter as you screw the tail in. Just after the o-ring disappears there is a satisfying soft-stop that you'll feel with your fingertips once everything is snug. That said: it's still possible to tighten past that point and doing so might cause damage.
I'm at a bit of a crossroads now in that I know a hard stop would be desireable but it would take well into next year to design, test and implement. Plus the current design is a good one so long as you're aware not to overtighten things. There are 13 other Lamplighters floating around out there that have never had a problem, including the 2 samples that have been riding around on my keychain for a few weeks:
I don't feel that this is an issue that I should cancel Run #1 over, but something that needs mentioned so everyone is aware. If you'd prefer to wait for a redesign with a defined hard stop that's no problem, just send me a PM! Otherwise I'm excited to build one for you and I think you're going to enjoy it glowing away on your bedside table.
