?? sixpack rod weights? and ly rod weights?

Youll have to weigh rod at both ends. Not the entire rod at once. Different centripetal masses...or something like that. You can get very close on stock rod balance by equalizing all caps, then equalizing all rods, so all weigh the same in total end to end. there are jigs that do this on a scale or you can balance the rod on a knife edge at the seam and weight the little end and equalize.