The 14's we had at Grafham (ages ago) were loving the foils because they could trim them to allow more drive downwind; if this is not how Bieker was expecting them to be used then hohu,- it is how they were being used, but I know from talking to the guys (and I am sure there was an article in the yachts and yachting mag over here stating that they use the foils to allow them to drive harder downhill) that they made the bear off at the top marj easier and that they could drive much harder down wind.