Ebay Purchase. Originally a test tank model. Pumped water ballast no rudder or keel. Now fitted with lead fin ballast plus 2 7ah gel cells. and auxiliary motor. Sailing rig "A" class . 72in long 32 in beam .Hull strip wood deck fibre board. Sail winch and heavy duty rudder servo fitted. Design guess work !! Note picture of setting up rudder. 3 years work. (5/10)