tank mounts are 101nylon. this is not a kit it is from bar stock, the flywheels are casting. the frame is alum. and is made in 2 pieces for easy machining.the prints are from jerry howell, his son now sell the plans and they are excellent. i have also build his i/c powerhouse which is from bar stock,and is a good one to start with, and a good runner. i need to hook up ignition,and assemble the gov. on other flywheel, and then to start. just got a new video cam. so when i get it figured out i hope to post videos of both. for me making the models is easier then posting pics. or videos.the plans can be gotten for alan howell at jerry howells site at jerry howell .com. thanks for looking. jonesie