The Dunlop 4D 300 Tour is a tight string pattern racquet 18x20, 11.02 oz strung weight and 5pts headlight strung balance and it is not very stiff, 63 is the stiffness. As far as I know it is not very powerful stick and it tends to be a bit unstable off the sweetspot. With such characteristics and having into mind that I play from baseline with moderate spin to flat hits, what kind of string you think would be better suited? I mean what kind of string can exploit better the characteristics of the racquet? Natural gut, multi, poly? I was thinking of ordering some MSV focus strings for my other racquets and I'd like to order for the 4D 300 Tour as well so they come altogether. Thanks.