I have a Mavic OpenPro rim from around 2000 that has a dent in one spot. The dent predated my ownership, so I don't know how it happened. It's about 1mm deep by a half-inch wide. How should I go about fixing it? The only trouble with the rim is during braking - the rim is in front, so I get a decent shudder. How should I go about fixing it? If it's not fixable, I will replace it, so I'm not worried about making it worse.