How to root TF700t ?

Hi Guys, i want to use omni rom on my tablet, so i used the Asus unlock tool to unlock my tablet, and it shows on start that the tablet is unlocked. but now when i tries to root using motochopper, it says failed...

I am on stock 4.2.1. please help!!!Attachment 3457234


also, if some one can give me a detailed guide on how to flash omni on this tablet, that will be very helpful!

Thanks guys!

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