Top and bottom hole positioning guides for letter-sized PVC/PETG clear sheets. These tools are intended for those without a laser cutter to quickly punch holes for the face shield at
https://www.prusaprinters.org/prints/25857 . A pdf template is here: https://www.thingiverse.com/download:8011698 .
The tools can be flipped for right or left hole positioning for a letter-sized sheet. The top guide can be used twice; the bottom one should be used only once. Of course, one can print two top guides and use them at once. Use a thin permanent marker to trace the holes; then use an office single-hole punch (about 1/4 inch) to cut out all the holes. Round up the corners.
0.2mm and 20% should work. A raft can be used for stability. To print the longer guide on a small bed, please consider rotating the part 45 degrees to fit into the printing space.
The author hasn't provided the model origin yet.
