Here is a correct overrides file for your scenario:
{
"printer-make-and-model": {
"RICOH MP C306Z PS3": {
"document-format-supported": {
"tag": 73,
"value": [
"application/octet-stream", "application/pdf", "application/postscript", "image/jpeg"
]
}
}
}
}
Is there something i could i have said to make it clearer?
By nature it is a bit complicated, but i also want people to be able to do it…