Hi DavidLE,
thank you for your kind support.
Honestly though, I can't see why for you it's not possible to provide informations here while instead it is possible thrugh PM.
Anyway meanwhile, if you want, you could start by answering the questions that I have made about the manufacturer, model, original CID and CSD of the cards you've modified successfully or at least confirm or deny that your statements are based on something like this old document here:
Thanks in advance!
AR