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Th=1); 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); // top left [left_edge, 0], // drop to axis [left_edge, -extra_depth], // bottom horizontal rib // h_wall(h=4, l=right_rib_x); // middle horizontal rib h_wall(h=4, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // bottom right [right_edge, rotate_vector_sin * height], // top left [left_edge, 0], // drop to axis [left_edge, -extra_depth], // top edge smoothing // thanks to http://www.iheartrobotics.com/ for the overall arrow size. // Scale factor for the Adafruit Feather M0 RFM.

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