Any boat wiring gurus out there?

[nightfighter]

Since I have the console disconnected to replace the fuel tank, I might as well look into updating 1993 Grady White wiring and switches. Looking for experienced input as this is not my strong suit. The current set up is all plug and play, which is a big pro for doing nothing. On the other hand, I think it would not be too expensive to go with new switches (and a button for the horn, requirement I am told) as most of the cost would be time. Not too many switches needed on a 20 footer.... Would likely look at a six or eight switch unit. What am I missing? I am also pulling out the stereo as I can blue tooth with my phone.... Now is the time to consider what to put in a new dash. Thanks

edit; That fuel gauge is coming out and the original Yamaha unit is going back in. The sender failure is what started me down this road a few years ago...