Check your top yoke nut, needs to be 110nm. Also your clip on torques. Old wobbler on the forum had this problem, presented itself as a rattle from the clocks. Worth a try !
How about your screen mounting screws & mirror bolts - are they all tight? Try packing between the clocks and screen with a rag or something soft and see if the rattle is still present. Could the rattling be coming from further down, under the clocks?