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B) Accompany it with a set screw. Set_screw = true; arrow_indicator_scale = 1.3; arrow_indicator_translate = [0,1,16]; arrow_scale_head = 2; holeWidth = 10.16; // If you 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); } } // Joy of Tech Scenes From A Multiverse (to get.

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