Guys, anyone had much experience with the Iso-Speed strings and offsetting tension loss with tighter initial string jobs? I've been using Head Rip Control in the crosses with Volkl V-Pro poly in the crosses of a Becker London frame. Hit well with this hybrid set-up, but chronically bad wrist kicked in. Read about Iso-Speed making the Head sting and using the poly fiber material, so bought a few sets. Info said to string 10% tighter. Love the string as a cross with the Volkl poly when new, but after a week there is too much tension loss and ball starts sailing. Much softer feel on the arm, so I'm trying to experiment. First effort was 64 and got too loose quicky. 67 felt great for about a week, then too lose. Last attempt was at 69 in the crosses!!! Felt firm but good on the first hit. My question is if the string loosens and then maintains, or just keeps losing tension quickly. Love it as a cross at the right tension, but don't want to have to replace it every week. Seems strange stringing a 98 frame at 69lbs, but I'm okay with it if the string will settle in at a solid tension for a while. Anyone have much experience with this?