Here is actually what I am doing:
On every new CC message from the OP-Z I get (I’m using the Motion Track, so it’s 191 - Parameter - Value), I am sending a CC message to the OP-Z to set the same parameter to 64 (so 191-Parameter-64). I don’t know how easy that is to program on the software you are using. (fwiw, I’m making my own visuals mostly from scratch, so I’m able to do what I want with that regard.)
Now I need to see which value I got on the first message: it can only be 65 or 63 (well sometimes if you’re very fast you can get 62 or 66), so I use value-64 to change whatever parameter I need in my software.
The trick is that somehow there is some midi echo (I’m not sure if I disabled it in the settings), so you need to not reply to the message that says that the parameter has been set to 64.
I hope that clarifies the logic here, but then again I guess it’s all about how easy you can program that.
Now I think there might be existing plugins or else to remap MIDI controllers, but I haven’t looked as I don’t need one, maybe find something to