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    Re: Level vials for mirror artificial horizons
    From: Randall Morrow
    Date: 2013 Mar 18, 08:19 -0700

    Here is a photo of the bases made for 2 precision vials (10 arc second) from a UK firm called "Level Developements". the vials are $50 and arrived from the UK only 3 days after order. The bases are square steel tubes 130 mm long, to accomodate the 120mm X 13mm vials. The fit is close but I wanted them to fit on my 6" x 6" mirrors. There are brass 1/2 round feet soldered on to allow for sanding to calibrate the levels. The color is from yellow paper accordioned beneath the vials. It is nice to have two vials as they can be set in a "T" on the mirror for leveling, eliminating turning the levels.
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