You can make an EmuNAND backup and then update to 10.5, just note that if you're using rxTools it does not support above 9.5 EmuNAND yet. You can Gateway (if you have a gw cart) and ReiNand though. The steps to spoof is literally the first post of this thread.I have an N3DS on 9.2 sys, and 9.5 emunand what do i download to spoof it?