7:48 PM, Monday February 6th 2023
It's no different from what's asked of you in the rest of the course - you do your best to follow the instructions, and nothing more.
You can rest assured that the boxes being "wrong" is not a problem for the exercise. If anything, it's kind of the point. The cylinders themselves are more part of the error analysis (like the line extensions), and they help us to identify where our boxes' proportions were off, so that in the next page you can make adjustments to how you draw your boxes to bring those line extensions closer together. This is mentioned in the cylinder challenge video, where we're looking at applying the line extensions and how we use them.