I figured they were ceiling mounted turrets. But geez, Will, they're still top-notch quality!
I can understand that only so much can be done, since the game's simple engine doesn't really account for a ceiling - thus being able to be mapped this way at all.
Maxim, that looks pretty handy, thanks for the link. One of my monitors is always too dark (but I don't think that can be helped, as it's probably a hardware problem at this point, I always have it cranked up and it's still dark), and my new(er) LCD monitors seem really bright and I'm not sure if that's by comparison to my old monitor or if they really are too bright. Sometimes I can visibly see the difference between colours even with with RGB value difference of 1, and I'm not sure if I should be able to.