If you are looking to up your consistancy on the big lake, I have a Fish Hawk 840 with a new full length power cable, transducer, and probe. This unit gives you temp/speed at the surface and rigger ball. Easy to install, no special rigger cables needed. $200, located in Portage. SOLD
The South End provides useful resources and discussion forums for those that fish The South End of Lake Michigan for Salmon, Steelhead, Perch, and Bass as well as elsewhere in the Region and Chicago area.