row_2 = row_1 + v_margin + 12; title_font = 10; // If you want wider holes for square, hexagonal etc. Shafts. ≥30 means "round, using current quality setting". /* [Top Rounding (optional)] */ // // top horizontal rib // h_wall(h=4, l=right_rib_x); // middle-bottom h rib pcb_holder(h=10, l=top_row-rail_clearance*2-15-thickness, th=1.15, wall_thickness=1); // lower h-rib reinforcer .