We built an all carbon F14 Aldo basically because we wanted to and we could! It also solved a "supply" problem with cost for small quantities of aluminium for beams and masts for what we originally considered an experimental design. Prior to the all carbon F14 we built a standard "one off" FRP 14' (but without spinnaker) with Aluminium beams and mast - the aluminium was the last of very old stock that we had in house. The weight difference between the carbon F14 and the FRP 14 was only14Kg's