From direct measurements of salient points (anchorages, mast tops and bases), this was fed into a form-finding program.
The next stage was to produce cutting patterns which were joined to form a 1:25 scale model.
The final structure was fabricated by Bert Bilsborough. Bert was still keen on using both sewn and welded seams in the early 1980s but most PVC coated membranes from that time just used high frequency welding. Some images of the first structure erected in the domain follow: