Thx, nerp.
I will also check out that other KB you mentioned. I do have, however, a sentimental attachment to all old things IBM.
Way, way back, my first job out of school was w/ Big Blue... back when there were two main divisions: "DP", data processing/the computer group; and "OP", Office Products/Selectric typewriters, dictation equipment, and copiers. I worked for the OP division in New Haven, CN. in the early seventies.
I'm concerned that the "clicking" model M will aggravate my wife. Our computers are both in the office room... 🙁