why would prestretched gut change the way it produces spin?
stringers pre-stretch gut so that the natural filaments lock together
and thus it holds tension better.
i think he means prestrung gut as in prestrung like those kmart rackets.
i dont know why you would prestring a racket with gut though. i'd take
it to the courts as soon as it was strung! i wouldn't let the string rot
away in my bag and not hit with it.