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[h_margin + working_width/4, row_1, 0]; square_out = [third_col, fourth_row, 0]; triangle_out = [third_col, fifth_row, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_4, 0]; left_rib_x = 0; right_rib_x = width_mm - thickness*2.2; left_rib_x = thickness + 6 + tolerance; rotate_vector_cos = 0.94; // 'x' of 20 degree rotation rotate_vector_sin = 0.34; // 'y' of rotation left_edge = -rotate_vector_sin * rail_depth; right_edge = height * rotate_vector_cos; [left_edge, rotate_vector_cos * rail_depth], // top horizontal rib h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=4, l=right_rib_x); // middle-bottom h rib // h_wall(h=4, l=right_rib_x); .

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