Lol, this is why I previously asked help when I had the same problem with my hitachi. To learn from what had happened. :p
I hooked my hitachi onto the pc like I did honderds of times before with other drives and I red the key. It turned out to be all 74.
When I hooked it again to the xbox the drive wouldn't play games anymore. I successfully unbricked it with the rgh (lucky for me it was a zephyr).
I retried all of this afterwards with the same method and all went well this time. It's very strange but I think that jungleflasher might be writing something to the flash under some circumstances.
O well, I didn't know you could retrieve a xenon cpu key when you transplant it to a zephyr. That's good to know...
At least I'm convinced that it's not bull$#!t... For the rest think what you want to believe, I don't trust these drives anymore