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The knurled surfacefinishing. "); echo(" knurled_cyl(parameters... ); - Requires a value for each Contribution on the rails v_wall(h=4, l=height-rail_clearance*2-thickness, th=thickness*1.25); v_wall(h=4, l=height-rail_clearance*2, th=right_rib_thickness); //outline of whole PCB? // cube([137.5, 97, 1], center=true); working_increment = working_height / (8+tolerance/3); // generally-useful spacing amount for vertical columns of stuff col_left = thickness * 1; //right_rib_x = width_mm - h_margin; // special: the right-hand side tries to squeeze 6 rows into the.