i dunno........ ihave a pro kennex boron graphite, i don't know if its 20 years old or not since it was my dads, but the strings were never broken, and i played with it alot and its soooooo freakin strong. sadly, i play very well with that.
yea, i have the 305, its freakin awesome for doubles, and i really like the string pattern, its hard to get used too at first but the spin is waaaaaaay hardcore, i sat my string tension to 80 pds