OK, I'm sorta Jonesing for one of the new Humminbird Helix 5 depthfinders. I have an old Lowrance LMS-337c and would like to upgrade.

BUT..

I just went out and looked at my boat. The current depthfinder was installed when I got my boat I have no clue how they did it........the cables are hidden up under the gunwales. And it's routed through spots that could only have been done with some special tools.

It'd be no problem to get the old one out IF I cut the cables at transducer and the three cables coming into the unit with large sized plugs. But then what? Can those cables be spliced back together? Surely the Lowrance is worth something, but not if all the cables are cut at both ends.

And then I have the same issue installing a new one......the danged transducers and head-end plugs are built-in, NOT removable. No way to get them through the tight spaces and small console hole. Worse case, I don't have to route the new cables through the conduit and hide it under gunwales, but I bet I regret it if I don't.

Surely, folks have bought and installed new depthfinders before!?!?!? How?

Any help to a pea brain would be appreciated.