Many things have changed over the years so please consult the most recent documentation on github:
https://openscan-org.github.io/OpenScan-Doc/hardware/OpenScanClassic/
The current printable files are organized and documented here:
https://github.com/OpenScan-org/OpenScan-Design/tree/main
The author marked this model as their own original creation. Imported from Thingiverse.