My ruler. The markings on this piece of found metal are spaced according to the width of my index finger. The side opposite the markings is the width of my wrist. The rigidity is useful, but the one thing that might be more helpful is if it were longer.
Technical drawings. The top shows plan view and the bottom shows side view. The numbers are really for my sake, to help me remember how many different types of parts I'm cutting. The mechanical connections will include dowels, screws, hinges, and nuts & bolts. Originally I wanted the entire piece to be made of plexi...but cutting gears out of plexi would most likely be an inefficient use of my time. So wood will be substituted for the gears and the temples.
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