23-38 feet down all year, 2.3mph and up, small colorful spoons off the riggers, I did well trying FLT spoons this year,(the smaller ones) been fishing that lake for 42 years
I used the mounting plates and toggle bolts for mine. I tried the well nuts on one but did not like how much play there was, and that was before I put the boat in water.
I had same problem. You have to download update from Lowrance website to SD card and stick card into unit . Will automatic fix. You can call Lowrance and they will walk you through it