The "dillon mini tunnel" gt pro racing tunnelboat. redesigned for 2014 see the new plans. also available: cockpit plans can be adapted to the mini tunnel. Tunnel mite is a compact replica of those exciting competition racing boats cleaning up the "silverware" on the world’s racing circuit.. Mean machine 2, same super fast hull design as the original mean machine, but with the updated racing inspired cowl. this fiberglass hull is a lightweight fiberglass.