I did a set with Aldila 85 gm shafts.  The swing weight came out heavy.  I wanted to put a different set of graphite shafts in these heads since I need more flex for better trajectory.  I was wondering if I would have to counter weight them or would I be better off to do some different heads.  My son also has a set with the KBS tour s plus and they are also very heavy.  Any feedback would be welcome.