again like i said if your (highly likely as i recall RXTools users had to patch TWLFirm for older cards like the AK2i and AGBFIRM to run VCs (still having to install on Emunand and Sysnand) if you've patched em you will either Brick or just flat out fail to download the update unless you revert to Stockversions of em. unless you have a FBI vers 2.XX+ injected into H&S/installed aftre updating you cant revert back to those patched versions and will loose being able to run your AK2i and GBAVC's untill payloads update to let you use any manager to install these/re-inject FBI.
^^
like i stated earlier to
@TimX24968B why your going to have so many Luma3DS users Suggest you Switch (which is Easy as Replacing the .dat and adding the /3DS/luma folder to the SD) is a prevenetative measure before an Update screws you over and you get stuck on a FW version that may take some time to revert / Downgrade or giev you Access to your CFW without the nee dto hardmod.
ummm You dont. the only DS Save Dump/Injecting we have is via Decrypt9 & FBI (i belive FBI only supports save dumping from teh cart)