Hi fellas , the four angled parts are armoured housings for the lights ( internal white lenses for the front , red rear). The other round device on the rear is an intercom device . - on earlier versions it was mounted on the l/h side of the hull , frequently hidden by the fuel tanks . ( I think I've got a wiring diagram somewhere ) edit - Servoblast posted a link that shows this feature http://tigerscorner.ru/gallery/image...er/1/%2015.jpg