Thanks for the input. The trolling speed is important to me when striped or hybrid fishing so that is very helpful. I was looking at the new lowrance elite 7 hdi series with the larger screen too. Too many choices so I pulled the trigger and ordered the 597 last night which is a couple hundred bucks less than the lowrance. I'm going to keep my fingers crossed that your experience with jumpy trolling speeds was isolated to that unit. Thanks again!
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