Couple questions for those that got this working:
1. Does this overwrite your current saves on your OoT cart?
2. If you write the GW save and it's corrupted, do you lose all your cart saves, or just the single GW save?
3. Could you perform a sysNAND backup, and does emuTool work to backup your emuNAND like before?
I love OoT and can do without my saves, I just want to know what to expect. I also don't want to lose functionality in the cart since I will want to play it again on my N3DS at some point. I got myself a copy of CN this morning too to future proof myself haha.
1. Yes this overwrites your current saves in the OoT cart, you could always backup the original save in case you want to go back.
2. If the save is corrupt then iirc it deleted the whole game, so all 6 files I suspect.
3. Yes you can, once you get into the Gateway menu. The emunand tool hasn't yet been updated to support the NN3DS I think, so no not yet.
As a response to your post above there, I suspect it's an exploit related to that specific save game and not the actual file, so I don't think it's a one time thing