

(fwiw I always use BootCamp assistant in the hopes that it would be more compatible).

a few billion hours of trial and error later revealed that these same builds I could UPGRADE to would also allow me to do a fresh install using that same build. I think the first build was 1511, then 1609, then maybe 1709 (forgive me if I am misquoting the build numbers as its been a while)… I found that if I updated them build by build from one build to the next, it continued to work until about the 3rd or 4th build.and then that's when it failed. So I got my hands on a copy of the first few original builds of Windows 10 and found, to my surprise, that this worked seemingly flawlessly.

The current build WILL NOT install for me. I kept running into the same issues as you. I too have a freshly installed Catalina from the internet recovery install. I have tried the original apple 256g m.2 drive that it came with, and have also tried a 128gb and a 512gb one as well. I've been trying for over three months, lol.
