So where I plan to place this I do have room for the 6 tube. And the seconds indication would likely be a good addition in that space. That said, I’d have nowhere for the 4 tube then so maybe I’m good for now !
I think the only negative right now for me is the power cord, I have not identified a good solution to hide it properly. However I’m still in the process of deciding what will be placed on these shelves and will likely do so with an eye to hiding the power cord for the Nixie.
I’m also thinking I want to get the single tube.