BAPS_Eric -- Have you ever driven a car that had a tire one ounce out of balance?  Seriously, with today's balls imbalance doesn't make a whole lot of difference.  But a lot of bowlers don't know that.  Before dynamic cores, all we had to work with was imbalance and that's what they still remember.  And many of them have passed that on to younger bowlers.  Try to educate them, but if they want specific weights, give them to them, just be sure you also put the pin in the right location.  --  JohnP