I think you're right, I mixed up some different locations. Here's the cool thing: while I was checking that against newspaper archives I happened to run across an older version of an illustration I saw used in the '90s, but the older version has a more complete caption! It confirms that the Science Museum of Minnesota installation was at least planned to have a Spitz STS like the Fleet. I'll see if I can tell if it was ever installed or not. I've been unsure of whether or not the Fleet was the only example of a combined Omnimax/planetarium.
The same illustration appeared with announcements of some other Omnimax theaters, but I suspect it had just been copied from the Minnesota design without paying much attention. The captions never mention the STS.
However, the side control booth located about halfway up the house, which is present in all of the Omnimax theaters where I've been able to check, is labeled as the "Planetarium console." This could explain the curiosity of the '90s Omnimax theaters having two different control booths. It seems odd to keep that feature without the planetarium projector.
The same illustration appeared with announcements of some other Omnimax theaters, but I suspect it had just been copied from the Minnesota design without paying much attention. The captions never mention the STS.
However, the side control booth located about halfway up the house, which is present in all of the Omnimax theaters where I've been able to check, is labeled as the "Planetarium console." This could explain the curiosity of the '90s Omnimax theaters having two different control booths. It seems odd to keep that feature without the planetarium projector.