Lotech, I think you are right about that. I think of there being 3 primary rod material types without getting into exotics and mixes. Graphite, fiberglass and bamboo. Of those the graphite can best handle heavier weight lines rather than lighter. I also think fiberglass is the most forgiving in either direction. Bamboo, which is basically all I use right now, can be the most critical of all to line right. Sure, up or down a line weight it will still function but if you want to have the sweet feel of the classic grass getting the right taper and weight can make a so-so rod just sing to you. 'Course it always tries to sing in soprano and goes off key quite often in my hands but you get the picture.