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2, to build up seven rows; middle one unused row_2 = row_1 + v_margin + 12; row_1 = v_margin+12; // draw panel, subtract holes union() { z_position = height - v_margin - title_font_size*1.5; working_height = height - hole_dist_top); cylinder(r=hole_r, h=thickness*2); echo("Putting a hole with radius: ", hole_r , " at .

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