Well Gurucube, I am pleased that you are comfortable with your relationship between head up and inputs, but your experience is not internationally recognised as many of the international R & D units are becoming increasingly concerned with the proliferation of screens in the Tower and the effect upon Head up time. The tower is the only part of the ATC environment to have its work areas split. As I said, for Area and Approach the traditional split between radar and strips was resolved by placing the spatial and alphanumeric data onto the single large screen. The Tower by contrast has continued the split and in the view of many controllers and researchers, exacerbated the situation over the years by the implementation of additional screens. Research work is actively being progressed at present, hopefully some results will emerge in the not too distant future.