Is there a non-cubic way to launch the homebrew channel on 4.xx?
Hello,
make a backup of your sysNAND, EmuNAND, SDcard content, upgrade your sysNAND on 9.2 (with safesysupdater or sysupdater), unlink your NAND (with tiny format on sysNAND) Enjoy!
At this point make a new backup of your sysNAND (9.2) and Emunand (4.xx; 9.xx; 10.xx) and apply *hax on our sysNAND
Tips: if you need sysNAND 4.xx use another SDcard with your backups (4GB or 8GB) and downgrade the 3ds(X(LL)) with your sysNAND.bin . inject your emunand in your new SDcard, you have 4 Firmwares: 2 sysNANDs (4.xx and 9.2) and 2 emuNANDs on 2 SD Card
Use it and make a new backup of your sysNAND 4.xx when you're done.
To reverse upgrade your sysNAND with sysNAND.bin 4.xx|9.2|10.xx, switch off the console, swap the SD card welcome in 9.2!!!
Do not do this 10 times a day, it is dangerous for NAND, but one or twices a week is tolerable.