There are some problems. I have 9.0E but I have a downgraded mset, as I was using gateway. And I don't have a nand backup anymore. Should I worry about it? Has anyone bricked the console by downgrading to 2.1 know a new 3ds 9.0E? I really want to be safe as it's not a normal new 3ds, but it's an ambassador edition. If I see that it's too dangerous I'll setup menuhax, anyway even in that case I'd like to know if there are problems with my current firmware and mset version. Ps: I already setup a 2ds for A9LH, and I forgot to say that not only the mset is downgrade but even the white list.