Cubic ninja was only avaliabe on japan e-shop (AFAIK) it was taken down. If you have a Japan e-shop version then yes you can. Please read the information o the ninjhax site.
WHen it is cubic ninja on 9.2 U/E/J or below it will work
I understood it in the way of you wanting to use the 3ds as a controller. SO this might be what you are looking for https://gbatemp.net/threads/3ds-controller.375443/ ?
Wouldn't it be hilarious if they would message you and say "Please apply a private header to your cia because otherwise we will ban you for pirating/cheating"
Well a anti-counterfeiting measure that you can circumvent isn't really anti-counterfeiting... (that statement isn't legally valid of course)
Well hacking is a technically crime in Germany (and i am pretty sure in America too). And there are still official hacking conferences in both countrys...
Maybe Organiz3d would work (it has a .3ds file but i have not much experience with it it kept denying me acess to f000000b)
Or you just get cubic ninja from somewhere and use it for ninjhax.
Otherwise I don't know.
Or mabye use this
It is possible you can. You just need a tool that dumps and rewrites exdata for you (don't know if gateway has something like this i don't own GW)
If you have cubic ninja you can use exdata_dump as metioned in the OP (Why should the new 3ds xl exdata be diffenent that the one of the small one...
Did you clos.... just kidding
Maybe cleaning helps (i can't help you with that I am always scared to damage technical parts while cleaning) but otherwise you will probably have to live with it.
I will test it though Tested it for me there was no difference between the x of a normal 3ds and a new...
AN eta on such a thing isn't simple. I some time in the future smea might release ninjhax for 9.7 BUT it might not be possible to launch CFW (smea definitely won't be aiming for it) if that is the case it is probably not that interesting for you (i assume you want to install .cias because of...
hahahaha I'm half way through a bag off my Volcano and my tolerance is way down because I haven't been smoking much lately, so I was a little slow to catch that that was what your angle was