Hi David,
I had to look up just what a "EFAITHFIX screen COF replacement kit" is; from what I saw on Amazon it's just a replacement screen with tools included. What I didn't see included was any equipment capable of transferring the True Tone data that came with the kit, unless you bought a different one than the one I saw.
So if there isn't a device programmer included with the kit, I don't understand what you're doing to read the original screen data. Do you have a programmer of your own that isn't working? If so, what kind do you have? I have the QianLi iCopy2 so I know that you can get the True Tone data needed either from the old screen or directly from the phone itself. 3uTools is capable of reading the MtSN number needed, then that number needs to be programmed into the replacement screen with a programmer.