I responded to this post via email but apparently it didn't go through for some reason. I am not very enamored with Google Groups... Anyway, this is what I typed into my ASR-33:
I'm not sure what you mean by "top tubes" unless you mean the IN-17
variety that have wires instead of pins.
I built the "Lena" a couple months ago and really like it.
http://nixiekits.eu/
The kit is very high quality and well thought-out, and the PIC
programming is quite clever in terms of the various effects that can
be configured. I must say, though, that the fact that the IN-12
tubes use an upside-down "2" filament for the "5" drives me a bit
crazy, so I try to never look at my clock when there's a "5" in the
hours or minutes ;^) . Also, Lena uses IN-17s for the seconds
digits. You would probably want the Lara kit, which has the same
mainboard but a different daughtercard for the six IN-2s.
Of course all of those tubes have "on the top" digits; if that's
what you mean then of course none of those will do. In that case,
check out "Sven reloaded" which uses side-view nixies.
BTW all of those kits have some SMT components, which are
pre-soldered. But the Lena was still a fairly challenging kit to
build, in a good way. You HAVE to follow the instructions closely or
you will goof something up, I'm sure if it.
cheers,
Dave B.