My first problem is with the classification of strings. They have S1, S2, S3, and S4. They describe them as follow: S1: Comfort S2: All-round S3: Spin/ playability S4: Spin/ durability. Okay, so I was thinking S1 will be multis, natural gut, etc. However, in this chart they provide, they list Spiky Shark, ALU power, and Signum Pro Tornado as S1 strings! What? http://www.stringway-nl.com/en/TAonline/ELONGATION TESTS CLASS 10-2011.pdf After completing the questions, it suggested I use S3 or S4 strings. The only strings listed in those categories are 1. Obscure and 2. Not much different than the S1 or S2 strings. Am I missing something or is this just way off?