guys, does a particular brand/model racket must always be string the way it is recommended by the manufacturer? can one choose to string another way? is it advisable? for example yonex nanospeed? what about racket that the manufacturer did not mention how it should be string? does that mean one can choose to string whatever way to one liking? another question, I have read from here that if one choose bg80, need to -2lb from whichever tension one want to achieve. and for other string one need to +2lb so that after 2/3 week of play the tension will be what one wanted. so do I need to take the 2/3 week of play where the tension will drop into consideration if I choose to string with bg80? thanks.