wing_thickness=6;
boss_thickness=12 - wing_thickness;
center_thickness=14;

module mirror_keep(v) {
    children();
    mirror(v) children();
}

mirror_keep([0, 0, 1]) {
    translate([0, 0, center_thickness/2]) {
        linear_extrude(wing_thickness) {
            import("wings.svg");
        }

        linear_extrude(wing_thickness + boss_thickness) {
            import("boss.svg");
        }
    }

    linear_extrude(center_thickness/2 + wing_thickness) {
        import("center.svg");
    }
}