I usually cut trees as low to the ground as possible,but I have noticed a real difference between upper and lower limb characteristics !my thought now is to disregard the first 2 feet off the stump to try to balance out this anomaly.this is only in theory but if the crowns where closer to uniform it would be easier to balance,because it seem to significantly in the first 2' from flat to somewhat round of trees about 6".thoughts.