This happened to me last week, 2mm bur slipped a little and gave me this. Remilled with no problem....Cost of doing business, whatever... This week I see this puck and I'm thinking...…… What if? So I put the puck back in the mill, opened the file in Sum 3D and lowered the restoration 0.4 mm in the Z axis so the bur would mill 0.4mm deeper in the puck (0.2mm wasn't enough). Then I selected the Finish exterior top line, did the Tool-path computing and Post Processed that one line and this is what came out of the mill Before you say anything you did read where I re-milled this last week, right? This one is not going out, just wanted to see what would happen.