I followed Plailect's guide back then to install cfw on my O3DS. I also had a Gateway 3DS cart, which I got it to work after adding a payload.
I haven't been much active on my 3DS lately but 2 weeks ago my brother asked me which region version I had for Smash Bros. I looked it up for the ID by...
although i ended up accidentally changing my nand with no way of going back bc i didn't know you needed a gamecube controller to restore it (i have a wii minus/1.1, which doesn't have gamecube controller support)
and if i find the sd card i have my NAND backed up on, i can not only restore the NAND if i solder the right part in, but i can also put my NAND on dolphin, then i can play dolphin online, like PMEX Remix or MKWii Riibalanced