Please don't downgrade a N2DSXL below 11.5. (Downgrading any 2|3DS system makes no sense anyway). The first N2DSXL consoles came with 11.4, but it was a
special version.
With a big warning
, I give you these two links
for reference only(!):
https://gbatemp.net/threads/release-rxtools-roxas75-3ds-toolkit-fw-2-0-9-2.382782/
https://gbatemp.net/threads/pre-release-wip-yet-another-rxtools.426092/
One topic is closed for very good reason – and the other contains a big warning by a moderator in the first post not to use rxTools anymore. All I could find on this topic is that rxTools only worked on SysNAND up to 9.2.
What shall I do to explain it any more explicitly and better? I'm starting to feel like this:
No public exploits for ARM9 kernel access in 3DS mode on version 11.4 and up.
I'm sure that, if anybody knew a method to do what you requested, they would have told you by now. With currently available methods your requirements can't be fulfilled.