i think i already setup emuNAND when i installed arm9hax/cake,v.v. and completed this step https://3ds.guide/move-emunandYou need to setup an emuNAND (because never run Gateway on your sysNAND,) and then use this to downgrade it
https://gbatemp.net/threads/3down-ctrnand-downgrade.467877/
and i think https://adrifcastr.github.io/3Down/
dont have file 11.2.0-35J_ctrtransfer_n3ds for my system









