A neighbor was going through his old boat stuff and gave me a furuno fcv663 fishfinder/depth machine.He didn't have the transducer.Questions I have, 1)is this a good machine,2)is it worth getting a transducer for cost wise 3)does Furuno have any kind of program that you can send unit to them and for fixed fee they go through it making any necessary repairs,yrs.ago many companies did ,though not advertised.Any info on this unit is appreciated.MIKE