Tried today and all went pretty smoothly, thanks. my device h reset from a tmobile ffu back to the NA ffu. My device was originally an open market north American device which i had to flash to a tmobile firmware because i had issues with phone and the open market firmware was not available at that time on wdrt. As we all know the open market north American firware once available on wdrt was broken. with this method all has been corrected and my device is now set to what the firmware is on wdrt.