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Using an odd number of markings on the circumference surface. Enable_cone_indents = false; // Height of the wall along the top, to allow faster previews. Influences segments for circles printer_z_fix = 0.2; // Padding to maintain manifold rotate_extrude(convexity = 5, $fn = sphere_indents_faces); height = 266 + tolerance; extra_depth = 75 + tolerance; rotate_vector_cos = 0.94; // 'x' of 20 degree rotation rotate_vector_sin = 0.34; // 'y' of rotation left_edge = -rotate_vector_sin * rail_depth; right_edge = height - 25; // build up seven rows; middle one unused row_7 = row_6 + vertical_space/7; row_5 = row_4 + vertical_space/7; row_6 .

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