Excellent job!
How did you approach the licensing matter, as in order to customise Windows installation media and in order to be compliant with licensing terms one needs to solve (and pay for) this non-trivial puzzle if it can be solved in the first place: https://download.microsoft.com/download/3/d/4/3d42bdc2-6725-... ?
I guess Microsoft has to make money somehow, but it's not funny. And the worst thing is that you somehow have to magically know this.
You should speak with your lawyers for concerns about licensing.
I'd note that the installation media was not modified (the DVD ISO provided by Microsoft was used unmodified), only the preinstallation media was modified (governed by ADK license).
As an individual installing onto one machine already licensed, I'm not really worried here.
I guess Microsoft has to make money somehow, but it's not funny. And the worst thing is that you somehow have to magically know this.