@muttonhead411, firmware loads successfully, but bluetooth doesn't work, I've also managed to do so with @RehabMan set of kext modifying few things in the .plist of BrcmPatchRAM2 and adding the new firmware to the repo.kext, which btw, as how a version is measured in macOS, the fw version should be v8785 (whatever the last four digits of the firmware version + 4096, then you get fw version to complete data..) I think this info is shared by @darkvoid in some of his post.
Did you managed to make bluetooth properly work??