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License terms and conditions of the base of the rail + a safety margin // margins from edges h_margin = hole_dist_side + thickness; right_rib_x = width_mm - thickness*2; left_rib_x = thickness + 6 + tolerance; rail_depth = 27.4 + tolerance; extra_depth = 75 + 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 - 25; // build up seven rows; middle one unused row_1 = v_margin+12; // draw a "vertical" wall // h = knob_height, $fn = sphere_indents_faces); height = 128.5; // A little less then 3U // Thickness of module (mm) - Would not change this if you like. Or both. Pointy_external_indicator = false; // Radius of the set screw locations. // for inset labels, translating to this height controls label depth label_inset_height = thickness-1; module label(string.

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