Developed a clunk and creak in the steering. Tracked it down to the rack and then to a loose pinion tension bolt. Tightened it up and it's no longer creaking or clunking.

Self centering is still fine.

I sense a rack replacement in the not too distant future, though.

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2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo