Time Trial / Time Trialling / TT

Seemed like a good idea, but the sprockets themselves are not that nice. As it turns out, I don't think sprocket changing is very frequent among people who TT on fixed. Course design means downhill bits are always balanced by uphill bits, and the same with headwind/tailwind. Consensus seems to be that you need one chainring and three sprockets 1 tooth apart, say 14/15/16. The 14 stays on your best rear wheel for fast days on fast courses, the 16 is for early season when it's a bit cold and you're going slowly and the 15 is for everything else, so once a year you change from the 16 to the 15 on your second best wheel, or put the 15 and 16 on the two sides if you have a double sided hub. Good quality hubs/sprockets are made for track league use, where you might change a sprocket every week through the season, so the number of sprocket changes imposed by a TT season, either one or none, is so far inside the design parameters that it's not even a consideration.

Many have tried, all have failed. It's still a suicide hub even with a BB lock ring masquerading as the real thing.

You should write a book, or website, or tablets of stone with all this stuff you know in. That's if you haven't already of course...!?