Three modules of the rudimentary system were made. Each module is 1.4 m long and has an 18 mm-thick
plywood frame consisting of four ribs and three parallel beams. The ribs also acted as former plates to shape the
CPC. The CPC itself was made from 1.5 mm HDPE sheet, cut, pressed and nailed to the frame. The surface of the
CPC was then coated with metalized plastic (crisp packet wrappers). The reactor tube is 50 mm OD borosilicate
glass, attached with two simple zincalume downpipe clips.