I used to windsurf then for last over 25 years I kite-surf, for last two years I am kite foiling, learned foiling on Triton mono-foil. Recently I started to gather equipment for wing-foiling and want progress in it. As one of my a hobbies I built custom kite boards, surfboards and foil-boards for kiting and winging. I am reading a lot about trends in these sports.