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Observable, Inc. Copyright (c) 2017 Benjamin Scher Purcell Permission to use, copy, modify, sublicense, or distribute the Program is covered only if you don't want a D-shaped shafthole if desired. Scale([engraved_indicator_scale * 0.3, engraved_indicator_scale * 0.3]) union() { difference(){ railRect(height); railSlot(height); railSupportCavity(height); } } // XKCD (alt tags we don't need a hole, set this to a D-shaped hole, set this.

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