When the Valiants were broken up they wouldn't let me have the CofG slide rule out of XD814. It was on my inventory and the cockpit was subsequently sold to a film company for the film 'Thunderball', It was the first to go and I was told that the information on the slipstick was restricted so I couldn't have it. I kept my manuals but they got lost in various moves over the years.
The cockpit wasn't used in the end, they used a mock up of a Vulcan; too difficult to get the cameras in the right place.
Years later I knocked up a slipstick for the Sikorsky S76A using the Valiant's slipstick principle. Then somebody invented a programme for a Psion and that became the official tool.