Originally Posted by Coycaine
You may want to search these threads. I don't remember reading about anyone trying to downgrade from NC5 back to MK2 yet, but I'm sure someone has at least tried. The leaked KK build (NC2) was able to be downgraded, but with some problems/issues.
There are some that tried and are now bricked until there is an ODIN file for NC5.
If root is important, one should just be patient, sit back, wait.