I have a 1984 Hunter 25.5 and noted the following: 1. From the underside of the cabin top, there are four screw connectors that seem to hold the top on. If I unscrew these, can I remove the entire top? What is this for? 2. Also, there are a number of fabric pieces with eyelets along the edges and have the same color pattern as my Bimini and main sail cover. These must be to cover something but I cannot figure out what. Is there an owner out there that can answer these questions?