Hello John
I came across your post via Google.
I had an Ohio Scientific C1P and C4P about 25 years ago. I have been
trying to find manuals for both these units just for the sake of
nostalgia. Have you any idea if anyone has posted these manuals apart
from in the 20046 page document you mention? If not I
would be grateful
if you could point me towards the secret link you mentioned.
Kind Regards - Ross