can i run a mega di unit with a megs di / si transducer? i believe it will work but want to be sure before i buy a new transducer. I have two units one is a Mega DI the other is a Mega DI/SI i cut the DI transducer cable and need to get a new one so thought maybe I just get the SI/DI transducer and then can switch the units positions on the boat if I wanted to?