Tonight I completed a couple more small things. I sanded all of the top braces. Then I cut off the little ears that were on the top and back. In the Martin factory, these ears and locating holes are used to locate the top/back. They have no use in my construction method so I cut them off in preparation for gluing the top and back to the sides.
When I glue the top and back, I think my best option will be to use F-clamps. This means I will have to cut away portions of the foam mold in order to get the clamps close enough to the sides. Once the top and back are glued to the sides, I can remove the body from the mold. I think this will be the next thing I work on.