I built this model truck and the main trailer in the dorm at MTU in 1971 -1972. I should have been studying, but this was more fun. It sat on many shelves over the years and was getting beat up. I cleaned it and rebuilt some missing parts. I started the pup in the summer of 1972. I made the pup from two MPC gravel trailers. The parts I didn't use went to make the tri-axle dump truck that I built. I had to make front steering dolly and shorten the main frame and dump body. It sat that way until the fall of 2007 when finished painting it and did the final assembly.