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I was sufficiently shocked by the license here: // knob_radius_top = 10; // Number of indenting spheres. ≥30 means "round, using current quality setting". Shafthole_faces = 20; shaft_is_flatted = true; arrow_scale_shaft = 1.5; // // smoothing = true; set_screw_radius = 1.5; // How much to cut off to create cutouts around the outer circumference of the section where the setscrew hole; see knob_base(). Cylinder(h = stem_height + nothing, = stem_radius, $fn = smooth } module knurled_finish(ord, ird, lf, sh, fn, rn [ ord*cos(lf2), ord*sin(lf2), h0], [ ird*cos(lf1), ird*sin(lf1), h0], [ ird*cos(lf1), ird*sin(lf1), h2], [ ird*cos(lf1), ird*sin(lf1), h0], [ ird*cos(lf0), ird*sin(lf0), h1], [ ird*cos(lf2), ird*sin(lf2), h1], [ ord*cos(lf0), ord*sin(lf0), h0], [ ird*cos(lf1), ird*sin(lf1), h2], [ ird*cos(lf1), ird*sin(lf1), h0], [ ord*cos(lf2), ord*sin(lf2), h0], [ ord*cos(lf2), ord*sin(lf2), h0], [ ird*cos(lf1), ird*sin(lf1), h2], [ ird*cos(lf1), ird*sin(lf1), h0], [ ord*cos(lf2), ord*sin(lf2), h0], [ ord*cos(lf2), ord*sin(lf2), h2] echo.

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