Ohio Scientific, anyone?

I thought i'd post about a machine which certainly qualifies to be classic, an ohio scientific challenger C1P of which i know nothing about. i did get some extensive documentation with it including a presale brochure, some photocopied machine language programs, the original reciept dated 20jun1980 for $425, some info about a d&n micro card which i also got, instructions for eprom burner software, basic ref manual, and some highly technical info and board schematics. i also have several cassette tapes of software including an original adventure 0 copyright 1979 for a 24k apple and asteroids also. i also got several boards that i dont know about included. one seems to be a floppy controller and ram card from d&n micro products, two of them say osi model 502 and 527 and some others i cannot tell what they are. they all have circuit traces some missing some sockets and all are mising components so it seems like its part of a kit. anyone know about this model? it seems to be apple ][ compatible, but i havent bothered turning it on yet. heh, would be neat to find a floppy drive for it... david