I have a spare XM 9 20 MSI T spare transducer. Would using it with a non mega Helix 7 SI GPS G2N unit give me a better picture. I know it will give me the temperature, but would it help, hinder or change the picture any? I realize I will not get mega as the head doesn't transmit at that freq.

The unit was a gift from an old fishing buddy. He has gone to Garmin.