This may be the ultimate replacement to all stage2/stage3 launchers:
https://github.com/ApacheThunder/NTR_Launcher/releases/tag/1.8
Users reported Cyclo DS, DSTwo, Original R4, DSTT, and AceKard2i working with this. I have personally tested a DS-Xtreme on this as well and that card works too. If a DS-Xtreme is bootable with this, there's a high chance that almost all the flashcarts are bootable now.
Best part is that dev launcher patch is not needed to use this anymore!
Just need more people to try it out to be sure. Have not gotten word yet on R4 SDHC clone compatibility.
I'll be happy to try this out with an EZ Flash Vi.
I have a N3DSXL with A9LH and the latest Luma.
Do I need anything else in particular? What should I do?