I used an FL-8 Propac for several years and had zero problems and good performance. This year I decided to upgrade and bought an FL-20. The first two times I used it , it did as adverised and it was really fun to use the split screen. The third time I took it out (having used it a total of about 14 hours) it started giving me problems after about three hours. It would not even read the bottom unless I turned the gain up to full and then it would still not show my lure or any fish. ( I was catching perch pretty good that day). I called Vexilar and they thought the transducer was bad so I sent it in. When I took it out last Saturday at Wolford it was better but I still could not see my lure or fish..no green, orange-red as it normally would. I moved the transducer up & down below the ice, tried every different setting and still all it would show was the bottom.I sent the unit back and today they called and said they could find nothing wrong. They were nice and are working with me but DARN I need a unit that works! Anyone else having problems with the FL 20?