Rotors available (for now) for K-H disc brake cars

matthon said

I just hit it with a grinder to take off the excess casting that rubs the caliper piston seals.
It was such a small amount, took all of a minute, no negative impacts.

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I think we're talking about two different rotor hats, finished (machined) or rough cast. I've been working with machined hats. I could see grinding a rough casting hat using a flap grinder, take it down 'til smooth and even around hat, makes sense. Don't see doing that with a machined hat.