I know that this topic has been beaten to death, but, i would just like to know how high i can string a ti10 3u w/o severely damaging it.
To my own experience, all the high end rackets (of course, no serious cracks) should take at least 22 - 24lbs without any problem. I know tons of ppl putting even higher than that, but as a conservative stringer, I won't go any higher than 24 for customers.
Take a read at this: http://www.badmintonforum.com/vb/showthread.php?s=&threadid=7884 Should clear some things up for ya.