Based on the answers provided, the following corrections need to be made to the 3D object:

1. The object should be redesigned to resemble an upside-down table. This means it should have distinct legs and a flat surface.
2. The object should be "U"-shaped with upright columns that are twice the width of the horizontal section. This means the upright columns should be wider than the horizontal section.
3. A circular hole should be added at the center of the horizontal surface of the table.
4. The hole should be small in comparison to the size of the table. This means the hole should not take up a large portion of the table's surface.