By effect of string weight, are we talking increase/decrease in speed. Has anyone done any testing on the whether an 8 strand is faster than a 14 strand? Chad an interesting thing to do would be to set up 2 strings, an 8 strand and 14 strand Dynaflight 97 flemish, complete with serving adequate for good nock fit. Weigh both, then shoot them. First see if there is a difference in noise levels or hand shock, second where do the arrows hit in relation to one another, third shoot thru a chrono. If the arrows hit in the same place, What' s the advantage? So what if the 8 strand is 2 fps faster than the 14, if they are hitting in the same place you can' t see or gain any advantage. You can then compare Dynaflight to Dyneena or any of the others. Then you could compare string life of each. By then you' re old and gray and all for a possible gain of a few fps. Too me with traditional shooting it doesn' t seem to be worth it. If there was a significant gain, with little or no negative effects, then it would be worth it. But that' s what' s great about archery, everyone has a different way, and I think if it works for you, who cares what others think