Hey the GAU looks absolutely amazing but maybe you could make just a oblong pod with a channel like this: www.ipmsstockholm.se/home/wp-content/uploads/2012/08/detail_hunter_05.jpg Or www.combataircraft.com/aircraft/fsu27_p_08_l.jpg As it is more low profile looking and thus cooler for use on sleek fighters. Also, at least for fixed guns, a crosshair is definitely something that would be very useful