My 3DSI own a New 3DS XL (in the colour of Metallic Blue).
I run CFW (custom firmware) on my 3DS in the form of Luma 3DS.
I originally hacked my 3DS when it was on firmware 11.3 using safehax and udsploit to install A9LH.
I later moved to boot9strap and then to fastboot3DS.
I currently have the following payloads on my SD card:
- Firm Linux Loader
- NTR Boot Flasher
If you are interested in homebrew or custom firmware for the Nintendo 3DS, I recommend you check out 3ds.hacks.guide