Hi !
I'm about to do mine as well.
After too many weeks of digging around for schematics of power supply, driver schematics, etc. I'll start probably this week-end.
Is there any chance you can make a drawing of your circuit and a copy/paste of the code ?
Did you multiplex your tubes ?
How did you choose the resistance to protect your tubes ?
How to you manage the fading effect ?
etc. 
Anyway, nice project.
I'll share mine soon hopefully !
Christophe.