If I have one house brick next to another house brick and next to another house brick and I add 10 house bricks to each, they are all the same height (pre-flashing). However, if I put three house bricks one on top of one and 10 house bricks on top of the next and 30 house bricks one on top of the next and I then add 10 house bricks to each I have a variance of height (post flashing). Do you get my drift?