Just wondered if anyone has done the latest update (V5.0) on their X-T1 and tried using an non-updated Nissin i40 flash with it since. If so I wonder does the flash still work just as before applying the X-T1 update, ie TTL flash etc etc.? I'm a bit reluctant to update my X-T1 as I don't want to lose the full functions of my non-updated i40. Many thanks in advance if someone is able to clarify this for me. George.