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

1. The central hole's diameter needs to be adjusted to be 1/8th of the cylinder's diameter. This is currently unclear and needs to be made more apparent.
2. Three additional holes need to be added around the central hole in a triangular formation. Currently, these holes are missing.
3. These three additional holes should be smaller than the central hole. As they are currently not present, this change needs to be implemented.