It's a long story of why I'd want to do this, but I have an extra 3DS for which I don't currently have a Gateway, but I do have a Gateway on another 3DS. The 3DS with no Gateway is on 9.2.0-20E, so it can't go onto the eShop, which is annoying. Can I do something like the following to buy stuff? 1. Borrow the Gateway from the other 3DS. 2. Create an EmuNAND (keeping the files intact by backing them up and restoring afterward). 3. Upgrade EmuNAND to 9.4.0. 4. Buy whatever from store. 5. Boot back to SysNAND. 6. Run game. The SysNAND has an NNID.