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

1. Add two rectangular cutouts on the edges of the object. The current model does not have any cutouts, which is a necessary feature.
2. Ensure that the left cutout is three times longer than the right cutout. This is a specific requirement that needs to be met.
3. Adjust the width of the object to be three times its height. The current ratio is unclear, so this adjustment will ensure the correct proportions.