I posted about this a while back. Progress happened since then.. also got my hands on a laser cutter for enclosure work (+ learned some FreeCad underway), and I am fairly happy with the results.
Still missing a few details (screws for the casing, some programming etc). The clock is non-multiplexing, updates clock via WiFi (+ has an RTC clock). The tube power supply is a fly-boost converter, which has been running nicely for a couple of months now.
Had a couple of iterations with the enclosure, turns out the tubes generates a fair amount of heat. After adding vents, it's doing fine (and, it keeps dust away automagically :D)