Flat bar conversion?

[Cyclespirit77]

Hi.
I'm looking at a flat bar conversion for my Giant Defy Advanced and need to know about hydraulic brake compatibility.
I know the 11 speed 105 drive train can be sorted with the sl-rs700 shifters, it's the brakes I need to understand.

I have the rs505 hydraulic set up with flat mount calipers. Will I be able to use MTB XT M8000 brake levers with these calipers???

thanks

[Brucey]

my understanding is that the answer is 'yes' because the pistons in the respective brake calipers are the same size.

cheers