Hi, I have a used highport intake cam for the SR20 to put on my lowport, but my question is more for cams in general. How much damage(scratches, etc) can a cam have and still be good? The cam I have has a few scratches on it--mostly real light on the faces of the lobes, but a couple of small moderate ones, and is slightly shipped on the edges of some of the lobes. What would be anyone-who-has-experience-with-cam's opinions about using it? Thanks in advance