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The arrow. Scale([engraved_indicator_scale * 0.3, engraved_indicator_scale * 0.3]) union() { difference(){ color([.1,.1,.1]) panel(width); // lower h-rib reinforcer cylinder(r=hole_r, h=thickness*2); echo("Putting a hole with radius: ", hole_r , " at ", hole_dist_side, height - v_margin.

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