First of all thank you for all the work you done for this amazing community, I installed following your tutorial using your Catalina 10.15.3 image and copied the EFI series 300 folder without any modifications and this is my Send Me File: https://drive.google.com/open?id=1Czf3eIFOaa3YvUBe2Kek19-tY8OeC7k1 , I will need to install BrcmBluetoothInjector.kext, BrcmFirmwareData.kext and BrcmPatchRAM3.kext in order for my bluetooth to work...
Thank you in advanced @MaLd0n