[amenghra]

method 1: Keep generating keys until you have a collision.

method 2: What you said, modify the details.

A fun way to play/explore all things GPG is to use a javascript library and Chrome's javascript debugger (e.g. https://openpgpjs.org/)

[ktta]

Yeah I was wondering if method 2 exists. I remember reading about something similar but wasn't sure. Thanks for the link!