We have made many light-weight hardtops over the years. This one was made with Divinycell foam and epoxy laminate each side. It was built with 25mm of camber and a 40mm thickened edge around the perimeter. The brief was to make it as light as possible without being too delicate. There were posts that needed to be allowed for which had small inserts to finish the check-outs once the hardtop was fitted. The final weight of this 1.6m square hardtop was 9kg.