Hi jxk
I have just found your post from a few years ago about Supermarine at Hursley ...
I was around in the days of the Attacker, Swift and Scimitar and remember that a full size wooden mock-up of the later was in the 'sheds' at Hursley (near Winchester). To reach this mock-up, draftsman had to negotiate a lengthy walk across a field of nettles armed with a ruler to take measurements and then go back to their drawing-boards and create the 3 view drawing.
I am the (volunteer) historian at Hursley Park and would very much like to chat about your time there with Supermarine if that is possible?