Instead of a fiberglass doghouse, my Seacraft had a complete canvas enclosure that would comfortably hold three people. When it got hot, the rear section could be unzipped and stowed. In addition the front eisenglass section could also be unzipped for more ventilation. It was really nice and less tiring to be completely out of the weather on long trips offshore in the cold RI mornings. It should also be less costly than a fibergalss doghouse. Pictures are at
http://members.cox.net/asgtech/Seacraft2.jpg and
http://members.cox.net/asgtech/Seacraft3.jpg