Original weighed 21kgs with lights (lights weigh 1kgs) and mine is under 8kgs so very good weight saving.

Im going to be making the centre clam over the coming weeks so will post some pics up.... basically I bolt the parts together and use a small amount of wax or clay in the shut lines depending upon their location etc... I then envelope bag the entire part to get a good seal although in truth I find getting a total seal very hard on these large complex multi part moulds.