Foil and LEI tech has stagnated, my best foil is from 1999, Modified of course, still I think it works better than the new ones, New foils are slow and dumb safe. FS has done a good job bridling, and making them fast, but theres only so much you can do to a twin skin, same with LEI's we went from 2 to 4 to 5 lines to 4 lines with bridles, change the shape little, each design has its flaws. Talk to 2 people one mite love a delta the other will still sleep with his Bow

rather than a Delta.