The original 2D drawings are in first angle projection (inferred). The drawings in your links are third angle (also inferred). This will affect the placement of

The original 2D drawings are in first angle projection (inferred). The drawings in your links are third angle (also inferred). This will affect the placement of the section view, but will not change how the section view looks like. i.e. in 3rd angle projection, the section view would be on top and not at the bottom of the parent view. Hopes this helps to clean up some of the confusion. The alignment of the section view is off as well. It should be aligned with the parent view: https://imgur.com/AZ9iHW9 https://imgur.com/AZ9iHW9