It seems that Nixie tubes and clocks are the latest hype, and I would be an idiot if I didn't go along too.
I did buy a kit including a polished chassis in stainless steel - HEAVY! And as I had gotten a bunch of ZM1020 nixies from a friend I ordered a basic kit w/o tubes. Both clocks are working but the latter is still without a proper housing.
The complete clock, however, went a minut or two ahead of time per day. Guess there's an adjustment to do.
About soldering the tubes. Hard work to get them in place and not only get them in place but have them standing in right angles.