Thank you for your in-depth review, really appreciate it ☺️ I completely understand your suggestion of using fantasy names and places to make it a bit more useable in any another OSR campaign. It's not easy to drop the buckriders in somewhere. But I did wrote it with the intent of a self-contained one-shot (multi-shot maybe) and the historical setting is a feature of that. Ofcourse any GM may turn things upside down to make it fit their story. I would encourage! 😉
Btw, being a historian by profession it's a bit of a trademark to use historical themes in my games with my regular game group ☺️ haha.