From the author: "For the longest time I've felt that there a lot of TI users that only have a cassette recorder for storage OR they get a console somewhere and have an old cassette player but no tapes available to load into their machine."

Here is the solution!

Tapes are recorded on NOS tapes on a high speed Telex tape duplicator, which has been tested extensively. He records the masters at maximum saturation so they will load reliably.