I went down into the studio tonight and unshipped the Tascam DA-30 MkII DAT deck. I had gotten a replacement belt for the tape loader a while ago and figured that I would follow the relatively simple instructions for replacing the belt so that I could transfer a number of old DAT tapes that we've still got sitting around to the hard disk of the computer.
I removed the cover with little problem. Then I went to unscrew the four screws that hold the transport loading mechanism in place. One of them was easily removed. The other three are frozen in place.
After messing around with it for a while, I called samwinolj. He suggested tapping the screws with a hammer (no luck), heating them with a soldering iron (nope), and finally using some penetrating oil (which I was loath to do around recording gear, but it was my last option -- and it doesn't seem to have helped so far).
I have, however, located a company in Bartlett that says that they'll transfer old DAT tapes for $15 a tape. Right now, that's looking really good.