We are in the process of replacing the tankage on Harmony, our Westsail 42. As has been described, the process is quite involved. We are removing all of the galley furniture to get at the tanks. Unfortunately, the galley furniture is not is good condition (i.e. dry rot, etc), so a replacement is a must do. However, I have not finished the furniture removal, but will need to remove the water tanks to get to the fuel tank.
The existing tank has been surveyed to be a 100 gallon black steel tank. I expect that I will have to take it out in pieces. Our engine was removed before we acquired the boat, so I have a relatively blank palate. I am considering installing two 50 gallon aluminum tanks in order to minimize the impact of contamination.
I will document what I find. However, I would appreciate those pictures as well. If possible, they can be forwarded to tate.1985@hotmail.com. We have just begun our restoration, an appreciate the efforts others have undertaken.