Ok so here it goes. I hope this is not the incorrect place to ask xD
I know 10.4 is now out and that browserHaxx is out of question. A friend of mine has a N3DS and he was sitting in 9.5 sysNand... he wanted to install CFW and such to it. I pointed him to the correct tutorials that I used to hack my own console and asked him to wait for us to meet so I could help if something went wrong.
He got impatient (got busy with family matters this weekend) and he started the downgrade guide. The thing is that guide if you are not on 10.3 will surely fail while doing the downgrade and will result in a partial downgrade (it happened to me on two consoles I've already downgraded... mine was on 10.3 so it went smoothly).
He tried calling me but since I was busy I wasn't able to answer him... the only thing he had to do was start the 3DS WITHOUT the microSD card on it and I will boot into a partially downgraded sysNAND... run browserHaxx again and attempt another downgrade procedure and that would make it a complete downgrade ( I did this with 2 consoles already and they are now running reiNAND 3.1 with 10.4 on Emunand and 9.2 Sysnand) but since this guy never looked for info and such he just did an "emergency recovery" pressing L + R + A + D-UP and "recovered from a bricked device" and well it updated to 10.4 now so he is literally screwed from any downgrades.
The question is... this guy has a physical copy of Cubic Ninja... so I want to know if we can use it as an entry point for HBL and then attempt a 9.2 downgrade again from there?
I've already told him he must WAIT until 10.4 gets a new entry point but I just wanted to know if downgrading from 10.4 to 9.2 is possible.
Thanks for your time and help everyone =)
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https://gbatemp.net/threads/how-to-transfer-emunand-to-another-sd-card-working-on-new3ds.383684/ use this Tutorial =)