Final Part!
First we start off with my most hated part. I know I said it was sanding...but really, it's drilling the holes. How do you ruin hours of work in 10secs? Drilling a hole completely wrong is how.
I first drill the hole for the button with a 16mm bit, then a hole for the battery connector. They are never quite perfect (drill bits never seem to be exact) so I have to break out some sandpaper and smooth the holes so the parts fit just right.

Once the holes are drilled, then I can start putting in the guts. First I start with the battery connections...a little bit of epoxy and a small clamp and let it sit for a bit. Then do the same with the positive connection.

Once those are set and hardened, it's time to break out the soldering gun and melt some wires together. Lots of time, lots of patience...working with tiny wires in a tiny space not my cup of tea.
And then I put a small magnet in the lid. It connects with the battery and holds it firm.
And then finally they are done!!

You'll notice I built these with drip cups on them. I've been going round and round with myself on these. I don't necessarily like them, I think they break up the beauty of the wood somewhat. But over time, even being careful with
juice and drips and atty leaks the wood starts to stain. So I decided it's something that needs to be added. I tried looking and asking around about getting something custom from delrin or stainless steel made, but it was much too cost prohibitive. So I went with what everyone else uses and visited the hardware store. In the end I don't think they look bad, and will certainly help with protecting the wood from ejuice and atty leaks.