I did this on the same machine, it was very buggy (dolphin browser crashed, play store would not work) so I decided to unroot and then try again. Now I have a messed up device. I have no access to settings, no home buttons, no back buttons not even a battery icon. I do not even have the slide lock screen any more. Is there a way to manually install through usb cable the twrp then maybe I could download ver. 10.2.4 and possibly restore so I can root it again. I tried to re-root but it appears that the settings are not wrong because it says permission denied to most stages. Possible a command line way to change those setting would also work. Other wise I guess I throw it away. As it is its useless.