Archers have used all types of materials over the centuries to make their bowstrings.Sinew most probably being the first. During my lifetime it started with Barbers Flax linen #13. It could be found in most of the shoe repair shops around the country. Now its hard to find because more modern threads are todays choice. Dacron B50 came along and it became the sting makers choice of many and then cam Fast Flight. Now days there are even other string matrials offered that this writer hasn't tried to date. I cut my teeth of Barbers Flax Linen, and then went to dacron B50. Dacron B50 makes a very good bowstring, and it shoots quieter, but does have a breakin stretching period. Fast Flight is great string material with far less stretch, but does create a little more noise. Fast Flight string offers greater speed than Dacron B50.Due to the greater strength of its thread, most archers choose to use less strands in their strings, which would be fine if the string loops were not reduced in size as well.This can mean doom for your bow, if the smaller string begins to saw into the bow nocks. My recommendation, if you are making strings on your own and using this type or any newer similar string material, would be to add 9 inch reinforcement strands in the area of the braided or endless served loops.These extra strands need to be in number as to the size you wish the finished diameter of the loops to be, in order to fill the bow nocks and eliminate the sawing action from happening. Alot of bow makers incorporated bow nock wedges, and tip overlays to accomidate the newly developed string materials and keep down complaints from buyers that tend to try anything new, and then when a failure would occur think that the failure was caused due to pour bow design,which was not the case. These alternations to bow design was done more for this reason than cosmetics. They felt also that it would give them a selling edge, that they could advertise that their bows were suitible for the latest popular string material. The fact is that all the maker would had to do at the time, was to make the string right, and this would have served the same purpose. I mention all this for one reason, as I was taught that it was best to keep a bows tips as light as possible, like a keen fly rod. The reason being that it would in itself produce better cast, than heavy tips. This is old school of thought that some makers of today may not agree upon, but just the same it is good that we all have such a great history in the sport of archery. A sport without a history, has no future to look forward to.Jerry Hill.........