[cctalk] "How to fix a Terak" tape?

I was reading my own Terak web page, and remembering that I'd read Doug Gale's history of computing at Cornell: https://ecommons.cornell.edu/bitstream/handle/1813/36810/00_TheEarlyYearsOf… and it mentions (at page 3.23) a "how to repair a Terak" video they made there, and he claims it was distributed to other universities that were also using Teraks. Has anyone ever seen this tape? - John