Hello Flip-The-Switch,
Please refer to the this article for the stapler specification, if this information doesn't help you I would suggest calling into the Support Center @ 1-800-821-2797 to arrange a service technician.
Win10 x64, Nuvera 288 PPS(installed September 1, 2020)
Case: will not corner stitch pages less than 30 sheets with a 30staple module. I changed curl from max to min using each curl choice thinking it maybe similar to Iridesse where you can chanfe curl up down or flat for both 1 and 2 sided documents.
I did notice during proofs that the entry of last page into staple area seemed very late like a timming issue.
Techs have been out but still no solve, any ideas? Anything I can do to try and help before I call for service