Greetings SMMOMS, Well Scott was showing off the newly refit Trilobite K-250 last Monday at the Aquarium of the Pacific in California. There are three pictures you can view from the link below. http://www.underseavoyager.org/index.html Notice the sponsons have two hoses going into the top of them, one for venting and the other I presume for filling with air. Two free flooding vents in the bottom as well. The bow tank which is painted clear acrylic doesn't look to have a vent line, and I don't see one in the rear either. So I suspect the sponsons are the main ballast tanks. The plastic hatch ring and hinge was a nice touch Greg added. Looks like they still need to add lead plates to the skids. Before Refit http://www.underseavoyager.org/images/IMG_4573.JPG http://www.underseavoyager.org/images/K250_pic.png http://www.underseavoyager.org/images/K250_pic2.png Regards, Szybowski |