OK, removed, cleaned everything, and reinstalled very carefully with the 4-bolt stem, carbon paste and loctite. And I painted each bolt at 12:00 to check for future movement.

I've got this torque wrench, and always store it with the setting dialed down. I'll take it into Performance sometime and see if I can get them to check it against a real shop tool.

https://www.performancebike.com/weba...280&cadevice=t