I have New 3DS (UK) with LumaCFW and A9LH installed. I followed the guide to the letter to install it, so assume I have backups, etc. I'm now on 11.4 and want to return to stock firmware so I can trade 3DS in. Yes, I know selling it with mod intact will fetch more, but I'm not bothered - I just want it back to stock so the shop I'm trading in to can't see it's been modded and refuse to take it. Thanks!