Question about balancing rotating assembly

Maybe some other parameter? I checked an original rod set from a 340 and got 5 grams heaviest to lightest. 4 grams variation on the small ends and 3 grams on the big ends.
I don't know what you mean. If you mean, was I mistaken? absolutely not. I wrote the numbers down at that time, but my kids will probably find it when I've passed. I bought a lab balance scale, and made a fixture to weigh each end, and brought them within a few grams. I figured it couldn't hurt, don't know that it made any diff since I never had it professionally balanced.