Default Flashing stock recovery I9505G for OTA updates

Hey guys,

Can you help out with a newbie question.

Im running android 4.4.2 on a rooted I9505 flashed with GPE edition rom. Im currently running I9505XXUEMKF baseband on a I9505 recognised as I9505G. On meteor network in Ireland.

My problem is Id like to get OTA updates, but these fail as I have TWRP installed. As I understand it this can be overcome by reflashing the stock recovery. Is this correct?

So my question then is how to know which stock recovery to flash? & can I do a backup of the current one I have installed in case something goes wrong?

Looking at this thread in development subform. & several are listed.