Hello, I'm just wondering what is the "magic" string and tension for the Pro Staff Tour 90. I have it strung with Alu power @ 55 lbs (25 kg) and I find it too harsh.... I know that 55 lbs is the magic number for the PC600 for example regardless of the string type..... Any such setup exist for the PS TOur 90 as well ? How well does it fare with all gut setup ? does it play well with hybrid (gut / alu) ? Thanks for your feedback.