Download plan price gbp55.00 . paperplan price gbp95.00. the pixie below is sailing in peru. the facts and figures. sheet ply stitch and glue. Design software: aerohydro (marine design and modeling software and services) aerologic (lofting, simulation and analysis software) aeromarine research (tunnel boat. Prepare to be amazed by the treddlecats revolutionary foil action which generates more speed, more fun, for the same effort. two people are easily able to.