Yeah, and actually, it's way easier than hacking your wii u / 3ds.
All you need to do is just replace the original files with the modded files. Keep in mind that you'll need to replace the update files and not the actual 1.0 files. Otherwise, your mod won't show at all
Old 3DS XL info:
I used to have a 3DSafe A9LH V11.3.0-36U with Luma in my CTRNAND. Since ReiNAND Reibooted and Re-Reileased, I "switch"ed back.
Right now, I have boot9strap with Luma 8.0 as my CFW. Though, I'd like to see other CFW's for B9S.