Kevin:

Go here:   MOUNTS@ESPMC-Eight.groups.io

And look at the files section.  In it you will see Bob's paper, my paper and a sketchup by Vince for the mount mechanics.  This should help.
Wes.

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Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired