I just used RUFUS and a regular downloadable install iso. You select the windows-to-go option. It was easy.
The only problem was I had to use another machine to do it. rufus does run in wine, but I didn’t figure out how to make the usb drives available to wine.
However… I do actually like this idea of documenting a real reference way that doesn’t depend on any extra tools. Even if it’s more manual, it’s better in that it’s more deterministic.
I do recommend going through the trouble to add a thermal pad inside the module for this.