I rebuilt/redesigned the whole electrical system on mine 14 or so years ago. made the mistake pulling open the original, not the best design, especially as the boat ages, impossible to work on, monitor for chafe, ect. I've done a lot of things to my boat, doing this might be the single best upgrade. Put the panels on a door, extended/bundled the wires, common negative bus, auxiliary positive bus, inverter, larger battery capacity, whole thing. It's time consuming but not too difficult so long as you go into it with knowledge of circuit loads. Expense varies how far you go, keeping the original panel will definitely keep the cost down (so long as the breakers are all still healthy). Move the battery switch out of there entirely, mine is down at the knees when sitting at the nav station. You'll be surprised how much room is back there once the battery switch is gone.Been spending some time on Blue Sea Systems panel wizard, think I'm going to upgrade to this hopefully this winter. If I was just starting this project today, I would plan to replace the entire panel.