Great! Installed legit CIA on my N3ds 10.5.0 !! using houston also.
Now, I followed this guide here
https://www.reddit.com/r/3dshacks/comments/476wy5/tutorialeshop_and_online_gameplay_on_outdated/
And managed to get 10.5.0-31E...thing is, the 4 CIA I "installed" on NAND (NVer thing, and eshop), each and every single one of them gave me an error to shut down the power... Still my version went from 10.5.0-30 (or 28, 29 idk) to 10.5.0-31E
I suppose they all installed without any problem, still I'd like to know if anyone has had this issue with NASA 1.4
thanks