Bits arrived, the project happened :-)

Boxes were bought from the Range, I think they are meant for découpage or something but work well as little wooden project boxes it seems.

remove hinges:

Also, add extra magnets in addition to the 'clasp' magnet.

Cut hole for Arduino Nano to poke through (Power and programming):

A bit messy but the wood is softer than I thought, will be filled with something (probably hot-melt glue) and will be unseen.

Filled with glue making it flush:

Measure twice, and cut hole for bubble display:

Mount and solder the bits. including plug for front which allows the thing to separate into 2 parts, making it easier to work on just one bit.

The 6th wire (clear) is in place for future use with a light sensor, but it dims itself at 10pm and brightens at 7am so its not a problem at the moment.

Running:

I wish the camera would focus on LED's properly, but hey ho.