Steve,
Here are the Cosmo Fleet ships I own. I believe these were made by Megahouse. I must've thrown away the boxes when I moved to Japan. I bought these years ago at a
dagashiya (traditional Japanese-style candy & snacks store) in Nagano Prefecture, which sadly no longer exists. These were blind boxed, and by chance I happened to get the three coolest ones!

Here's the Yamato. The guns do
not swivel. A friend of mine actually was able to take his off, file down the pegs, and now his turrets swivel. He's also a sculptor by trade and an expert modeler, so that's how he could do something like this with confidence.

Here's Deslar's command ship. The top and bottom spines broke during shipping, so I super-glued them back on.

Here's the red Gamilus battle carrier. This one is pretty cool. Not only do the cannons swivel (unlike the Yamato's), but it comes with a tiny little drill launcher bomber plane which I am sure to lose someday. The flight deck can actually pop out and be replaced by the gun emplacements, just as in the anime. Neat, huh?

OK, so here is something new: a blind box chibi Yamato 2199 girls series by Megahouse. I found these at the Plum store in Suwa, Nagano Prefecture today for 700 yen each. I was hoping for Yuki, Akira, or Misaki, but instead I got Makoto instead. So apparently we are getting some new gachapon-style toys for 2199 after all!