Foil relative to mast

A lot of interesting talk here about fuse and stab tuning. To compliment this, can anyone explain the impact of front foil « fuse » length relative to mast? I remember this being discussed briefly on the podcast. Wanted to know how this could impact board choice and in particular mast track position. I ride all F-One gear. Their tracks were further forward than most from the start but now other brands seem to be taking that direction which could open up some possibilities for me to try new boards.