OK, folks asked, so here it is! This doesn't have all the part #s yet because we're trying to source very cheap ones, and also trying to find non-PVC parts where possible.

Don't worry -- this looks untidy but it's only the very first version of this model we've made -- we're in the process of finding final parts and then we'll do a nice clean version with new build photos. But this is quite robust and sturdy -- it holds a calibration quite well, even in my bike bag. (I guess that bears some tests... will do soon!)

A limited (and fast-evolving) parts list can be found here. Anyhow, without further ado, here are the photos:

The whole thing is built around a small, USB HD webcam, pictured. It helps that the webcams we're buying (from Syba) have square sides, so we can get precise angles.

Here's the webcam inside a 1" Type-LB PVC conduit access port. We've switched all desktop models to this part because its rigid, standardized, and really pretty much perfectly shaped and sized. It's even water resistant!

Inside the box -- this looks super messy, but as I mentioned, we're working on a folding black card-paper insert which will make this straightforward. Hopefully it'll even allow adjusting the webcam angle. This one uses an older camera and a lot of hot glue -- we were just figuring out the geometry.

Here you can see the myriad joints we used to build an arm -- this could be simplified or adapted to different mountings, different lights, etc.

This is super messy for now, but it's because we're sourcing the final lamps, dimmers, etc and trying out different ones as we go. It's hard to fit everything in that little box; we may try switching to a larger one, or doing custom-cut faceplates so we can move the lamp further back.

And that's pretty much it for now! Questions? Suggestions? Even better -- post your own build photos! I know lots of you are building your own already...