The author remixed this model.
This version was modified better to fit the blades I ordered from Amazon.
https://www.amazon.com/gp/product/B0051PJSAW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
I also reinforced the edge closer to the opening for the paper roll as everytime I tried to install the old blade it would break off.
Printed it with 30% infil and PETG and seems to work pretty good. Just be very careful inserting the blade as it is snug.
No supports requried.