Thanks for the reply. Will do thatThere are many threads. You could just read the instructions on first post for this rom. But basically clean install means flashing latest oos to both slots before flashing pe12 to both slots. Make sure to install twrp installer zip after each flash before rebooting back to recovery to switch slots. After all 4 flashes and 4 reboots to recovery do a factory reset from twrp wipe menu and also wipe data by typing yes.