I have a quadrabeam transducer on the boat. It is a few or more years old. How would I know the model # and if it will work with a 997C ? From what I think I'll need a "Y" cable so I could use it with my 2D/SI/DI ducer ? If this is correct, will I be able to use everything I have now and end up with an "extra" screen for the quadrabeam. AND, finally, would I want to ? Sorry, a lot of questions but all related, thanks guys.