I have an Onix 10 CI SI & want to add a Solix 12 Chirp Mega SI to the console & move the Onix to the trolling motor. This will require that I purchase a SI trolling motor transducer which I currently do not have. I believe an Onix transducer will work on a Solix unit excluding the mega, but will a Solix Chirp Mega SI transducer work on an Onix SI unit excluding the mega capability? If I buy a Solix transducer for the Onix, I can later upgrade the bow trolling motor head unit to a Solix.