It was the outer nuts on the Spacer lugs. No problem with the nuts provided with the spacers that are on the Hub stud bolts. And to be honest, I was the last one to turn the lug nuts ... when I installed the spacers last year. So now I have purchased a much larger Breaker Bar to make it easier to torque them all to at least 100-120 ftlbs. And I brought a needle-type torque wrench home from my hangar to check the torque.
I really like these spacers, with the stance they provide, and greater stability, and in reducing the sensitivity of the steering. That was really light with the stock setup. Our good friend in PHX seems to not like spacers.

But not having them is the most dorky part of the stock TB appearance, IMHO.