i hit with my FXP radical mp which was strung with one year old fibergel. took it out for some serves and the immediate thing that i notice was, wow this is very crisp! i never knew fibergel was this crips. but i remember when i played with the FXP prestige (mid and midplus), those also hit very crisply. is it the string or the racquet that makes it so crisp? and suggestions on crisp strings?