The FX1 failed at Datchet which had over a dozen at one stage for a very real reason, it was a compromise boat that sailed well with 2 light crew but failed abysmally with its other hat, that of a single handed boat being just too heavy and unrightable ( which I think has now been resolved with the use of a righting pole ). Sadly the final nail in the FX1's coffin was that the F16's are now on average faster, considerably cheaper and can be moved around on the beach single handed.