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. Tech support. the best technical support: we will help you succeed! all our plans and kits come with full technical support. ask questions on our support web site. 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.