PLATO system / CDC mainframe / PLATO terminals

OK, now I know there are some mainframe freaks out there on this list :-), but I would be absolutely flabbergasted if someone had a working CDC mainframe running PLATO! However, I figure there is still a small chance that someone has a PLATO terminal? These were Z80-based, IIRC, had plasma screen displays at first, and later had raster displays. They were *heavy* and if I recall correctly they had a card cage on top of which sat the monitor. They also had a funky PLATO specific keyboard. Any other PLATO users out there? I was on udel's system in the 1978-1986 time frame, off and on, although PLATO wasn't the primary focus of my activities. I did a little Tutor programming, but somehow the language never quite gelled with me. -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>