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    Level vials for mirror artificial horizons
    From: Randall Morrow
    Date: 2013 Mar 12, 10:54 -0700

    In previous postings I described how very sensitive spirit levels can be made by anyone. It is easier and cheaper in the long run to buy commercially made level vials. Here are two sources:
    Level Developments in UK sells 13 second vials for $50.00 each.
    L. S/ Starrett CO. in USA sells 10 second vials for about the same.
    The vials can be put into protective bases with brass 1/2 round feet than can be sanded for fine tuning. An example is attached.

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