Corner balancing only makes the diagonal weights equal. It physically doesn’t move weight around. Diagonal weights that are not equal will make the vehicle handle differently turning to the left as compared to the right. For instance, it might oversteer to the left and understeer to the right. Technically, the car should be readjusted after any change, including new sets of tires. I am not that anal, but definitely wait until you are done making mods to the car.
Make sure you align the car with weight in the driver’s seat, and then leave the weight in the car during the corner balancing. One side of the each anti-roll bar (ARB) needs to be disconnected, have about one-half tank of fuel, and the tires need to be at proper “hot” pressures when you corner weigh. After the adjustments and with the weight still in the driver’s seat, reattach the ARBs with no preload.
Bob