No modification to the 3D printed part "Face Shield - PNWS - Short."

A two-part design for cutting the clear plastic from two different standard-size transparency sheets is included in an SVG file.  See the "Supplemental Documentation" section to download this file. 

The visor above the head is cut from a second sheet.  Two visors can be cut from a single transparency sheet.
The front of the face shield can be created with another transparency and a hole punch.  The standard 6-hole pattern from the 3dVerkstan design is used.

The sheet could be cut with a laser cutter or die cut machine.