–Aaannnd it’s back to M11. I MAY have found advice at the Leica Forum on fixing the SD card/freezing issues, and its ergonomics are just too good–fewer buttons, simpler menus, etc.
–Went for a 10.5 mile ride west. A young guy on a single speed (rare) passed me, pedaling faster than I was. Dawned on me that I could drop back from a 15-tooth rear cog to a 14-tooth. So I did (not easy, as I had to re-tension the chain). On thinking, I “earned” the 15-tooth after years of near-daily riding. It’s possible, if I ride a lot over the next year or two, I’ll be able to move back up to the higher-geared ride. We’ll see.