Just wanted to bring this to everyone's attention.
This all started happening in a
topic unrelated to downgrading, so it may have gone unnoticed by many.
The process is working fine for old3DS owners, but is a little less reliable for new3DS users.
Some have reported having to try up to 50 times before finally succeeding in downgrading their new3DS. It mostly seems to hang at step 8, if it does, hard reboot and start over until it finally gets passed step 8.
@TheStoneBanana has put together a tutorial
here, and
@Ptrk25 a quick tutorial specifically aimed at new3DS users
here.
Enjoy your free Gateway-free CFW!