Originally Posted By: gbeer
The problem comes from errors in reading the image. The edges of the parts are either rounded (out of focus) or not quite square to the scanner's rows.

Those are roundovers on the exposed finished edges. The only places you should see them in the scan are around the cooling holes, and at the front edge of the side pieces.

Just include the blurry part in the overall measurement (the scanner is pretty good about that), and the exact length can tolerate a mm or two of variance there.

-ml