I made the thread for the firmeare with tools they used to built or modify so others will not have to go through the whole ordeal I had. I will not be able to help with how to and building the firmware but I will try to share what I have and did. The firmwares are all Apple set up and if you need raw files, I may have some. The files are not for firmware locked removal and it is for corrupt ME regions or some files are whole firmware. All with clean ME that can be used for same model devices and no serial number. Open ME Analyzer (uploaded) and drag your Bios file to check the version. Download the similar or higher ME region and replace the ME region. That is your part to learn as it is the easiest part. ME11.8 for A1708 Mid 2017 13in Retina ME8.0.4.1414 or zmid 2012 and E2013 Retina 15in ME9.5.3.1526 for A1466 Mac Air I will upload sample video on basic ME firmware "How to". Please check on YouTube with the link. I t is not going to be a professional video since I will be using my phone to record. https://www.youtube.com/channel/UCYWT1fdYNhnIsxk0SH2pXhA