Good Enough Calipers

This is my caliper. There are many like it, but this one is mine.

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Rack and pinion from: http://www.thingiverse.com/thing:944471
Screw and bolt from: http://www.thingiverse.com/thing:1183
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Note, the screw is left-handed, so that CCW rotation to open the calipers will tighten the bolt. This is intentional. When you go to screw it on, remember "lefty-tighty, righty-loosey".

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