This is great!!!! Thanks guys for this. I had actually just reproduced it by hand this week against the Arduino Mega board to make a standalone version I was going to post when done. It would have support for the ATmega1280, Arduinix, WizNet ethernet and hopefully when done a RTC and potentially battery backup. I want to finish prototyping with the Arduino Mega board to make sure the rerouting of pins works. I also went SMD for most parts as I can keep it smaller and prefer them often over doing TH.
Any chance we can also get the layouts for the daughterboards for the tubes? I really want to do one for the IN-18 nixies