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= hole_dist_side*4; v_margin = hole_dist_top*2; v_margin = hole_dist_top*2 + thickness; right_rib_x = width_mm - thickness*2.2; left_rib_x = thickness * 1; h_wall(h=4, l=right_rib_x); // one more vertical to mount the circuit board to, dead center pcb_holder(h=10, l=top_row-rail_clearance*2, th=1.15, wall_thickness=1); // lower h-rib reinforcer cylinder(r=hole_r, h=thickness*2); echo("Putting a hole with radius: ", hole_r , " at ", hole_dist_side, height - v_margin*2 - title_font_size; working_increment = (working_height-v_margin+thickness) / (9); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; col_middle = col_left + (15.6 .

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