My question is when building a stand for a glass tank, would the 2x4s that are green in this picture be shorter than the total height of the stand? I know the bottom of them are at the lowest point the stand, but what about the top? Should the top be below the top rail edge by about an inch of so or should it be flush? And would be same rule apply to the 2X4 that is colored blue in the top center? Should this be flush or sunk down below the top edge?

