Exactly! I like the tubes to be big. The one I saw seemed to run on its own and did not need to be connected to a master clock. But yes, the tubes weren't huge. Although the enclosure did look nice and big.
Have you seen the Dalibor Farny tube clocks? I've reviewed them here: www.watchprosite.com
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And have you seen the MAD Gallery Nixie Machine? Here's the video on YouTube: