[Msquared]

A few responses to those who've replied. First, thanks for the well wishes. All really is well. I actually got into a novice's car to begin coaching after getting my car roadworthy for the drive home. If that doesn't prove I wasn't rattled by the brake failure, I don't know what would!

The thought of sabotage actually briefly crossed my mind, LOL, but the only person I know of who hates me enough to do that wouldn't have the slightest clue how to do it. Also, getting to the inside bleeder screw would probably require removing the wheel, which didn't happen. OTOH, my wife might want to collect on our life insurance policy...

I know the well-known person whose 2020 SS 1LE crashed at a track due to one corner's brake failure. It wasn't because of this problem. That is confirmed.

Okay, so putting the car on jackstands this evening and checking all the bleeders, all the others are snug but not close to the spec. My current hypothesis is that although they weren't loose to begin with, they were never actually tight enough. They survived the heat cycles of one TT and the autocrosses, but the extra brake load on the RF that my local track causes just made that corner's bleeders work loose through the expansion and contraction of heat cycles. I still find it incredible that both bleeders loosened at basically the same time.* I'm still open to other hypotheses if anyone comes up with them.

I have a good in/lb (also reads N.m to the tenth) torque wrench, and this will go on every bleeder before every track day for sure! BTW, 13-15 lb/ft is 156-180 in/lb. And I did verify the specs that MT-SS1LE gave us in my copy of the FSM. Regarding p47dman's advice about using a flare nut wrench, I won't actually put the final torque on these things while the catch can hose is still attached to the bleeder. After any bleeding is done, I am using a hex 1mm socket on my torque wrench. I definitely won't use a 12-point socket, though, for the same reason you mention.

*Although I know for sure that at least one of the two bleeders loosened to the point of leakage between Turns 2 and 3, I only really know that the other loosened somewhere between there and my crawl back to the paddock. But that's close enough to call it "at the same time."