Now that I have had time to digest the cosmic implications of a 12-string bass, I must expand my question:
Is his bass EVER in tune with itself?
I have owned 3 12-strings over the years, and 2 of them were perversely unwilling to be tuned, and those were g**t*rs, which, everyone knows, are a snap to play compared with bass. I mean, you learn the three "holts" on the neck, and you've got it.
The third one was a 1967 Rickenbacker 366/12, and I strung it with what were heavy gauge strings for an electric 12: .011 (E) - .52W (low E). The only problem arose the first time I restrung it. Following my usual habit, I took all the strings off, only to watch the bridge, tailpiece and nut all fall off on the floor. Did you ever try to string up an axe while you were simultaneously holding the R tailpiece, the bridge, and the nut in position? It is a fortunate thing that I had the strength of character to continue -- a lesser mortal might have chucked the whold catastrophe into the closest rubbish tip [that's for Mr #]. I persevered, and eventually I got 2 strings strung and reasonably tuned, and from there I was able to string it the rest of the way. I swore a mighty oath, scorching the air in my studio, that I would never take off all strings at the same time, and thereafter I didn't. I eventually gave it to my stepson for his birthday, with the admonition "don't do what I have done."
But it was all worth it, when, about a year after this incident, I stopped by the local shop where I bought my Dobro 21 years ago (am I getting old?). The ordinarily mild proprietor was staining the atmosphere a deep shade of blue with his language, and I approached his work bench to find out the cause.
There on the g**t*r rest was a Ric 12, with all the strings off.
"How the $#^$% do you get these things back together?" he inquired. "Gee, I don't know," I replied. "Mine never gave me the least bit of trouble."
For that, and a few other indiscretions, I will surely fry in Hell someday, but the look on his face was worth it.