On a full core..... you can add weight under the joint screw and the in the rear to even it out..................
Kim
Weight at the joint and at the butt is not the same as weight in the middle. As an example a one ounce, 3 foot long carbon fiber tube with a 7 ounce weight at the butt and a 7 ounce weighted screw at the joint would behave differently than 1 ounce tube with a 14 ounce weight in the middle. The best way to weight a full splice is to determine how much weight is needed, then bore in from the butt to that spot epoxy in the weight and glue in a core to fill the hole. As far as the OP's question very few players could tell the difference and it certainly doesn't affect play.