Logically invert the pin?

Sun 2018.11.18

Was going to suggest that, trying to avoid more tedious soldering, but remember, then it's 'option base one' for the remaining viewable Neo's

Also, . . . . One could run a long data wire from the last of those beneath each Nixie to where B6 was to control the in-between Neo's

See note #27 where software SPI may not work
and

http://www.espruino.com/Reference#l_SPI_­setup
'those based on nRF52 chips can have SPI on any pins'