You can safely use FF on any trad bow.The important thing is you have to use fewer strands than you would with Dacron (to allow/match safe stretch of the string) and build up the loops to prevent the thin FF from cutting into the bow.The safest easiest way is to double serve the string loops and the serving area where you draw and contact the bows builder to determine how many strands to use.Theres info on all this in one of the three "Trad Bowyers Bible" series of books.