I have worked on a couple of boats going through this. I did the
electrical and
electronics part, and I got to watch the other stuff. The
electronics can be a real bear as you can't cut the
radar antenna cable,
GPS cable, maybe some others. The real problem with it all is access and how much they secured the wires when they originally built the
boat at the factory, or wherever the flybridge was put on. It is time consuming with much swearing involved. But you can do it eventually. But you have to either pull the electronic
cables all the way up to the flybridge/arch or go the other way. Your call on what is the easiest. You have to disconnect whichever end you need to pull up and protect it well for pulling through holes just barely big enough. Sometimes you do not want to cut off the connectors.
The
electrical is usually easier in that you can cut most of the wires. Labeling is critically important for when you want to put it all back together.
If you have a separate
steering station up there and that needs to be removed, usually hydraulic although it could be electronic, that requires the ability to disconnect, seal, and protect the ends of the tubing. Wires are easier. Same for
engine controls if you have them, e.g. a MicroCommander, which is easier as it is just
wiring and connectors. But labeling is key here too as you want to put everything back together exactly the way it was.
The physical
parts - access, dismemberment, etc. - depends on how it was put together. There will be caulking to remove on some of it, perhaps most all of it. This can be a terrible job and one where you can truly damage things you don't want to damage -
gelcoat,
fiberglass, metal trim,
paint, woodwork, etc. You have to use great care and be patient, especially if you have never done it before. It is not a sawsall job unless you want to pay someone to do the
repairs at the other end. Those will be dramatically expensive since colors have to be matched, damaged trim repaired/replaced, screws and bolts figured out, etc.
If you labeled everything then putting back the mechanical and electrical
parts is pretty straightforward but time consuming. Use labels that will not be torn off during the
removal, travel, and reinstallation. You will hate life if you don't do that.
Can you do it? Yep, but it will be a chore and very dependent on your particular flybridge and how it was originally built. I suspect you will have some damage to
repair, but the pros doing it will probably have some to do as well, only less so. Unfortunately some parts may have to be destroyed, like
plywood internal bracing/reinforcements, etc. But not guaranteed you'll have to face that. Someone who has done that particular model, year, etc. before will have a rough idea what that will be. You will be on a mission of discovery. But, given the wide different number of models, and changes to models over the years, and lack of experience by some pros, you will be doing the same as them, only slower.
You can do it all though but it isn't an easy job - usually. You may luck out. You might be able to hire someone to do a particularly hard part. Good luck.