2 windows are needed to be designed, Think of a sausage shape, perfect half circle each end for the longer window and the shorter window would be a half version so just a half circle on one side with the overall length being half. Pictures show the cardboard templates I made as a rough guide. They are to hold a layer of polycarbonate that will be the windows glazing. The frame would be used to also neaten up the void so would be best if it could be The thickness of the walls. Each side measures 26mm. The glazing i believe is 4mm although I'd have to double check what thickness would insulate well enough. Ideally the candidate best suited for this task would have good CAD skills and creativity with a knowledge of various processes of manufacturing from designs to ensure that the end design is actually able to be produced without the costs spiralling.