I'm using stock kernel. I have had no issues with this at all. I knew some people also using Power Kernel with PR1.2 with this hack and it worked for them tool PR1.3 power kernel may be still not yet compiled but i'm sure that it will work as well. This hack still allowing you to do a system update OTA as well. it does not conflicting with the OTA update. The only problem is the OTA update will replace the FMTXD back to standard one and you'll need to unlocking it again after the update. Otherwise it's perminant and only needs to do just once as long you don't reflashing your OS or update But you can hack it back again just like Transition.ini