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

1. Add a side profile that consists of a thin rectangle and two squares. Currently, the object is a long, thin rectangular prism without any visible squares attached to it.
2. Ensure the height of the rectangle is about 1/20th of its width. The current ratio is unclear.
3. Make the side of the first square about half the width of the rectangle. Currently, there are no squares visible in the images of the object.
4. Add a second square that is just smaller than the first square. Currently, there are no squares visible on the object.
5. Ensure the depth of the extruded object is about 20 times the width of the rectangle in the sketch. The current depth to width ratio is unclear.