I am upgrading my Raymarine RL80C+ radar display to a TZTL2. I want to use the sounder feature in the MFD. Can I re-use the transducer from the RL80C. It is an airmar B744V, but with only seven pin plug. Are the internals of the Raymarine B744V the same as the Furuno B744v? I know the wiring/plugs are different, but can I re-wire the old one and reuse it? It would be a pain to unbed a 3M5200 transducer and replace it.