R2D2 Dome Washer Made with Stepdown Bit

The top of the R2D2 dome has a dome washer around a dome topper.  The method I used to get the washer was to take a 1″ x 1/4″ washer with the same thickness as the dome, and use a step down bit to widen the hole.  This was a careful process until I was able to get it just right.

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