I have downgraded 6 NEW3DS from 10.3 to 9.2 I have downgraded a number of old3ds too. NO BRICKS. I use the SULIB version of sysupdater. the first update tusxh made. I also can run downgrade on about the 5th try or so. using MENUHAX/FTPBRONY (b exit) and than sysupdater run. It never bricked. I think this whole it bricks systems is just people being dumb tbh. IE: Wrong update files. turns off before restart. doesn't wait on freeze for restart (at least 10 min) Presses buttons closes lid, and other idiot thing to do when downgrading lol. As a last edit: Make sure after you upgrade to 10.3 you format the system memory. Basically I do this: Format system memory. Format SD. Setup exploit Browserhax ->MenuHax->homebrewlauncher->ftpbrony (b exit)->sysupdater y button as soon as you see it ready to press. PRESS NOTHING ELSE till it finishes. don't turn off 3ds. if freeze on "restarting system in 10 seconds" wait 10 min or so. (It's not done installing cia's....) I use this one: https://mega.nz/#!CldEmRQR!mbOVHbiisw9JJNljXEeiugFhOtDaov10udQgyGQRIFM Sysupdater by tusxh it's his update of it. ALL CREDIT TO TUSXH,prof,ice, etc,mega, etc.