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I have the following questions regarding the repair of cylinder
music boxes:

1. What is the best way to polish the brass barrel of the
cylinder without disturbing the pins?

2. Is a clock mainspring barrel such as made by Hermle or
Kieninger suitable for use in a cylinder music box?  I have
to repair one with more than 50% of the teeth damaged.

3. Where can I obtain the reduction gear set in a governor?