Windows 11 VirtualBox guest in openSUSE Tumbleweed host

Windows 11 arrived early October. Visual Studio 2022 arrived early November. Here I am in the middle of November thinking of taking both of them on a test ride. My Dell G3 and Lenovo Legion are both capable of running Windows 11 but I have no intention of disrupting my current workflow. Not for the next one quarter. So, VirtualBox it is.

Windows 11 and VirtualBox

The first attempt was a failure as Windows 11 refused to install on "incompatible hardware". Found a solution soon enough. If the link goes missing, the PDF should serve as an alternative: