Designed and printed a box for the lightronome:

The mounting hardware still need some work, but the device is working now:

There are a few comments to add:

• The mounting hardware still need some work, so you can expect some writing about it
• The two currently used buttons also has remote capability through a 3.5mm Jack. The external buttons drive the internal ones through optocouplers. This is not isolated just there for providing some noise immunity.
• There are place on the board for crystal. I don't know if such precision is required, but I didn't populated yet.