Today I fixed a screw up by a local shop. They cut/chased an extra inch of threads on a fork and installed it on the bike.
It just didn't feel right while riding so I tore it down. First bottom bearing cage was upside down and the gasket on the fork race was being squeezed out the bottom corner of one of the cups.
Then I realize they tossed out my aluminum shim that was made the 27mm race fit TIGHT on the 26.4mm fork. The shim was perfect and you needed to use a hammer/flat head to pop it off.
With the shim thrown out, the race was basically just loose/wobbly on top of the crown....they just assembled it back together anyway.
Later I figured out my old Pista unicrown fork had a 26.4 race so I ended up using that instead. Now the steering is buttery smooth.