Apologies if this has been asked a million times. I have read several threads on this and I am still unclear. Possibly because some of them have old info. Here is what Step 2 of Section VI currently says: My main question: Is one of the two 3DSs going to permanently lose its ability to have a NNID? My plan: I want the NNID back on 3ds #1 so that in 2 weeks I can do this again, using 3ds #1 and another 11.1 3ds. So in 1 week, after doing the full A9LH guide on 3ds #2, I am going to do "System Transfer from 3DS #2 back to 3DS #1". But, again, my question is. After doing that will 3DS #2 lose the ability to have a NNID ever again? Or, after doing that, do I simply just format 3DS #2 and then someone can put a new NNID on it just fine.