Quote:
Originally Posted by 40 Deluxe
Somewhere awhile back I saw a tip in a magazine that said to cut "V" notches in the edge of the disk. Similar to your method.
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Cutting "V" notches or cutting the disc in the shape of a triangle or square was not meant to provide a 'fresh' area of grinding material but gave flexibility to the disc that allowed it to conform to curved or convex surfaces. (did that back in the 50's)