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

1. Modify the shape of the object to resemble an "L" shape. Currently, it forms a "V" shape with acute angles. The object should have a right angle to accurately represent an "L" shape. 

The size of the object is unclear, however, no changes are suggested as per the guidelines. The object's extrusion in one dimension is correct and does not need any changes.