Ok, next 2 questions:

1. How can I tell what firmware I need? The files are listed as R8AA018_RED52, R8AB001_RED52, etc but how do I know which one is unbranded or branded? What do these codes mean? I understand which region I need thanks to justme for that.

2. Is there a section for the 770 in the CDA part? I cannot see it there.

Thanks for the continued help.