8′ puddle duck racer one design racing sailboat based on bolger brick. developmental class, defined hull, unlimited sail rig and underwater fins.. Trailer plans for construction of box trailers, cage trailers, off road trailers, car carriers & flatbed trailers, plans & drawings to national standards. What you get. our plans and instructions are very detailed, comprehensive and easy to follow. depending on the plan you choose, you will get a number of detailed.