Hello and welcome to the one tool nobody asked for! A serial number editor! Simply put your prodinfo.bin file in the same folder as the Python script and run it from the command prompt. The resulting prodinfo can be restored via incognito.nro.
Follow the on-screen instructions and you're good to go!
Featuring:

• Editing of your switch's serial number (duh)
• Primitive checks (serial number length, prefix etc)
• Check digit calculation (and overwrite if necessary)

This is my first Python project. I plan to include a couple more features (see the GitHub page) and I thought I'd share what I did up to this point. How you'll use this tool is up to you.
Have fun and stay safe!

Source: will post the GitHub link at a later time, as I'm still a new member.