Reply by D_Allen

The problem with using most anything that will prevent the CA from making the bond to the mandrel is that it would also take away from the friction fit. Be careful using a device that holds by pressing out because on small objects they can easily break. Compressing from the outside is better as it will be compressing the ring against itself. The best way would be a scroll chuck and flat plate with rubber holders. You could finish one half and then turn it around to do the other half. But you may not have such a tool.

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