[Q] How to root SGP512 (4.4.4, 23.0.1.A.4.30) topic

I unlocked the bootloader following Sony's tutorial and now im just stuck on how to root it. From what i can tell 23.0.1.A.4.30 isn't rootable, am I able to downgrade my firmware then root?

Sorry, only just got the Tab :)

I just bought myself the Z2 Tablet (SGP512) topic

So I got it out of the box and straight away it had a bunch of updates, which I went through with.
Im now sitting on Android 4.4.4 build number 23.0.1.A.4.30.
I was wondering if this could be rooted? This is my first Sony device so I'm new here :)