Just rooted this one.
Initial Foothold:
Enum everything, make sure your getting a FULL picture, after you find the right info it should lead straight into user.
User:
If you found the foothold you should have this.
Root:
Took some research and a nudge from a friend, sometimes when you hit a wall you just gotta dig under. Take a look at the at the information you have and search for the hole.