There's no better feeling than aligning the camera with the cube plate. This is after a long battle with the CG camera focal length, CG Cube scale, and slight tilt on the Z-axis.
The focal length of the cube plate is slightly different than what I used in my clean plate. The cube plate has a focal length of 24mm while the clean plate has a focal length of 20mm. Otherwise, the angle of camera is exactly the same. I think that in the future, I might have an issue with the scale of my objects.