Just performed a successful DSiware downgrade with hyperbanned 3DS as a source. Source 3DS had both 002-0102 and 022-2812 ban. I've used this method to bypass 002-0102 ban (regain access to eShop) and unlink my NNID from banned console (changing the console ID, stored at the end of SecureInfo_A AND injecting a blank nnidsave.bin is neccessary on the banned console!) Accessing NNID settings still resulted in 022-2812 error, but it allowed me to use System Transfer again. I've purchased Fieldrunners with no NNID linked to the source 3DS and System Transfered it to unbanned, target 3DS without any issues. Most importantly, it seems that SecureInfo_A and LocalFriendCodeSeed_B didn't get transferred from the banned, source 3DS - I have used a hex editor to compare these files dumped from source console before the transfer and dumped from target console after the transfer with hex editor, their contents are completely different. Target console has A9LH installed now and remains unbanned after the process - no issues with accessing NNID settings, eShop, playing games online. I haven't found any informations on that so I decided to mention it here. That said, use this information at your own risk - I take no responsibility if your target console ends up getting banned after performing a system transfer - I'm just saying that was not the case for me. I would also like to know if there are any other files (that are checked by Nintendo servers) that I should compare to make sure they haven't been transferred? If so, which ones?