My build process has become somewhat stable. After each run the scripts upload everything (binaries produced and scripts used) here:
[https://corwin.bru.st/emacs-28](https://corwin.bru.st/emacs-28)
In addition to what gets posted to the [alpha FTP site](https://alpha.gnu.org/gnu/emacs/pretest/windows/), the scripts make and upload "NATIVE\_FULL\_AOT" versions (from the `emacs-28` and `master` branches, currently).
If you aren't familiar, passing `NATIVE_FULL_AOT=1` to `make` triggers full ahead-of-time native elisp compilation. In the case of Windows builds, this means the build will include DLLs for most/all elisp sources distributed with Emacs. These DLLs can be used without additional pre-requisites apart from what is included in `emacs-<version>.zip` (or `emacs-<version>-installer.exe`). This is useful when you can't --don't want-- to put GCC/libgccjit on a Windows system where you use Emacs.
Thanks much for all of the help testing out the builds I've been making and in advance for your feedback on the AOT versions.