Capita makes lots of different snowboards I don't see how the compatibility works. Im sure you know more than I do though.
-Would you say the flex of the cartels is good for what I need though then?
If so, the only reason I am gonna buy new bindings is to get those canted footbeds that ride makes. Wide stances totally throw the knees out of alignment so these seem awesome.
-What is better Ride Delta Or Ride Contraband?
....and Union makes more than one binding.
As for the Cartels that I have they wouldn't work on anything but EST boards. But they do have canted foot beds which feel pretty sexy.
I don't know anything about Ride bindings.