Sometimes figuring out how to make parts for the boat is fun.  I needed a fiberglass tube to act as the mast base.  The tube had to be slightly larger than 2.5" ID.  I used a pool noodle with a dowel to keep it straight, wrapped it with newspaper to the proper diameter and covered it with plastic.  Now I just need to wrap it with several layers of fiberglass cloth and resin.  I should then be able to destroy/remove the pool noodle and have the proper size tube.