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BackA higher-than-necessary value // Thanks to http://www.iheartrobotics.com/ for the arrow's shaft size. Engraved_indicator_shaft_scale = 1.5; set_screw_depth = 9; set_screw_height = 4; // Number of facets of rounding cylinder ct = -0.1; // circle translate? Not sure. Circle_radius = knob_radius_top; // just match the height of the base shape. See knob_base(). Rotate([0, 0, i * (360/RingMarkings)] cube([RingWidth*.5, MarkingWidth, 2], center=true); cube([8, 3, KnobHeight], center=true); // Flat for D-shaped hole // begin arrow top cutout cylinder(r=8, h=10, $fn=3, center=true); for (z = [0 : sphere_indents_count]) { z_position = sphere_indents_radius + (enable_stem ? Stem_height : 0) + knob_height - cone_indents_cutdepth; for (z = [0 .
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