Another addition, my car has 29k miles (46k km) - its a G30 540i with the 19in on summer tyres. Its in excellent condition (not driven hard, not powerslid, did 3 launch controls its whole life). The part fails naturally. The Guibo (or Flex Disc replacement) will solve 80-90% of the issue. The center bearing solves the rest.
The low hum (very low amplitude and frequency) is gone. I think the finding is the same as other people here in the forum.