Years ago I had a Lowrance paper graph that the drive for the paper was worn out from use. Lowrance had some reps at a tournament in Oswego and were repairing units free. The rep took mine apart removed the paper drive then replace it with a new and improved drive and went into the electronics and wired it so I could slow the paper down even slower than before. The paper wasn't cheap so this was great. I wrote Lowrance and said you have a customer for life. No other company that makes anything would do that for free. I wouldn't have anything else in my boat.