Paul, as Manny states it's important that the tech using a sophisticated balancing machine knows what he's doing. Experience is a real key. My son took his BMW M3 to a specialty shop that had the Hunter GSP 9700 (I'm suspecting from my son's description of the machine's capabilities) and the tech reoriented each tire on the wheel to minimize the balance weight required.

Was the right front rotor replaced or checked for balance?

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Fred Hoelzle