Improved the model with chamfers for better insertion of the steel sheets.
I used PLA, but also PETG would be a good material.
For my personal print i added the feeds which are als available on printables.
I also improved the feets for this sheet holder. You can find them here: https://www.printables.com/de/model/311691-stability-feet-for-3x-prusa-steel-sheet-holder-sna
The author remixed this model.