I will preface this by saying I've done some searching about removing NNID's and have come up with mixed answers so I'm looking for clarification. I've got an O3DS XL I just sold running Sysnand 4.2u (Downgraded from 9.x using gateway) and emunand 10.1 with RxTools. I basically want to reset the console to factory settings (IE - Remove my NNID from the EmuNand) so the buyer can use his NNID (assuming he has one). Since the sysnand is 4.2 and doesn't have NNID support, can I just delete the NNID using the System tool in the EmuNand? Also, how could I go about deleting all my profile info from the sysnand? Is it safe to use the format system data option from sysnand? Any other precautions I should take before I ship the console? Would it just be easier to restore my old Sysnand backup (9.x) remove my NNID from that and reformat my EmuNand and reinstall Rx-Tools?