Step 6: Finishing
- This stopper is meant to work with a rubber o-ring. So, make two marks for different diameters.
- While the piece is still on the drill , sand it. I use at least three numbers of sand papers, 80,100,120.
- Remove the piece from the drill and mount it on a vice. Use a saw to cut off the upper and lower parts of the piece.
- Mount the o-ring and test it on a bottle.
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