BTW, I discovered there are a few references to the Black Knight satellite throughout these papers as well. Just newspaper clippings from the time that they saved and classified, but it proves it was real and of interest to them.
Don't have links atm sorry I found it late last night via an /r/conspiracy thread, just thought I'd mention it to you since you've been digging around in there :)
Ah, I tried to search that but I couldn't narrow the terms enough to find any references, and there were just so many files on Russian everything space related.
Thanks for thinking of me though and if you remember any reference, please pass it along! I've been following that story for well over a decade.