Quantum, sorry to hijack a post on this thread, but where is the save file export guide link you mentioned? I don't see a link from you in the thread.
At this stage I would be happy to just be done with Gateway on my N3ds system. Have a bunch of .3ds games on it with various saves that I really didn't want to lose, but if there's a way to transfer them to a standard luma sys/emunand (whatever it's supposed to be) i'd be all over that. Using a luma updated old 3dsx system to play new stuff, but most of my content is on my N3ds Gateway based system. I miss having the improved 3D tracking and such. I'll miss GW cheats (offline of course) but i'd rather have an 'all-in-one' solution at this point, rather than bouncing between 2 systems.
In that case, I need to figure out how to clone my N3ds's microsd card to a 128gb card, so I can bring over the Gateway save states + games.