Hi TT community, I have been using kelvar/syngut/poly hybrid for the past decade, and it has taken its toll on my arm. After and endless search for a comfortable full poly setup, I have settled and been using Tier1 Firewire for a couple of months in a hybrid crossed with BB Bomber NYC and am loving the easy access to spin, controllable power, and feel. I have tried a full bed of Firewire and found it very lively, powerful (too much for me), ball bite, and moderately crisp. Unlike many other shaped strings (hex, pentagon, hepta, etc) that I have tried in the past, Firewire has a very distinctive triangular shaped profile. The edges are sharp & pointy giving it real easy access to spin, whereas other shaped strings has rounded edges reducing max spin potential. The durability of this string is amazing without sacrificing feel. It's unlike any other strings that I've played with. You will have to try it for yourself to believe it. To my suprise, one string that I have not tried is the Solinco Tour Bite and am wondering if anyone who had tried both strings could share their experience in terms of spin production. You can disregard all other charateristics.