With the release of the Lixie II (which is wildly different internally) and the maturation of the Lixie 1, I have decided to move all future updates to a new Hackaday.io page centered around the new design! Please check it out and follow development there if you're interested! :)

LIXIE II - The #NewNixie for Arduino

https://hackaday.io/project/165079-lixie-ii-the-newnixie-for-arduino

(Lixie II is available right now on Tindie!)
https://www.tindie.com/products/connornishijima/lixie-ii-the-newnixie-for-arduino-kit/