How do you downgrade from NXE to the Blades completely?

[Bitmap Frogs]

smbu2000 said:
I don't believe that you can, at least not without doing something like taking out the hard drive and possibly flashing it with an ghost copy of an old bladed 360 hard drive, but I don't know.

I still have the blades on my old 360 Core system w/20gb hdd. I just haven't had it connected to the internet since I got my Elite. It's just sitting in the "Elite" box at the moment wasting away, hehe.

 

X360's firmware upgrades burn fuses in the motherboard. You can't downgrade it.

edit: I just found out pre-falcons are vulnerable to a timing attack which allows a downgrade... details at http://beta.ivancover.com/wiki/index.php/Xbox_360_Timing_Attack