Based on the answers provided, the corrections needed for the 3D object are as follows:

1. The circular holes on the rectangular plate need to be symmetrically aligned. Ensure that the holes are evenly spaced and aligned in a symmetrical pattern across the rectangle.

2. The circular holes should be repositioned to be aligned near the top left corner of the rectangle. Currently, they are more towards the center, so they need to be moved closer to the top left corner.