See this link: http://blog.flexispy.com/how-to-down...-4-4-2-to-4-3/
Scroll down to where they begin flashing the bootloader itself. They instruct you to wipe after the bootloader is flashed.
Only way to find to find out is to just do it.
How did Kox get tripped btw? You said you never rooted mainly because of that reason.
If it is already tripped you should just root it, install cwm, do a nandroid backup and try the method in the second link you posted.
So if it fails you just recover your nandroid backup and back to square one.
Hope this helps!