Yeah my Emunand is uptodate (10.3), but rxtools doesn't work with my o3DS , I always get an (X) during the set up of the 2.6 version and a "Instalation Failed" message using the 3.0 version .
but I feel like I can get a cleaner install if I do it from scratch again , that's why I want to format it along with my 3ds's sysnand