Ive got an eagle 480 that works pretty good{I think}I was told when i bought it that lowrance manufactors eagle and has most of the same technology. does anyone know if this is so and if the adjustments are basicly the same?? maybe the lowrance expert would enlighten us poor boys that are lucky to have any electronics how to adjust and opperate our"finders"if they differ from the high dollar stuff.I know I for one would greatly appreciate learning how to fine tune.does tweaking a unit help ,what is the cost, can it be done to the 480??I 'm running the 480 on the bow and I have a hummingbird 8000 lcr on the console . is the 8000 a good unit ?? it came on the boat with no paper work,manuals,nothing. I'm totally lost on this one and would appreciate any info on it also.I know its old but does seem to work but am lost on adjusting.