In the not to distant future I will be starting my wiring. I've always enjoyed doing that part of the job and pride myself on doing clean installs. I think I'm going to add a new deal for me when doing the wiring.
You can get good quality clear heatshrink tubing from these folks.
http://bestboatwire.com/
Use the computer and note pad to make labels for the wiring.
This will add more time to the job, but there is a hell'va lot of wire going in this boat.