The MFD range of plans and instructions was started by the late Vic King over forty years ago. Vic had been a lifelong fairground modeller and early retirement presented the opportunity to draw up plans for fairground rides, organs and trailers. All were carefully researched and prototype models built before the plans were released. Vic entered several of the prototype models in the National Model Engineer Exhibition in London and they received awards.  The chair-o-planes received a gold medal.  Over the years several thousand models have been built from these designs. All rides were designed to be built up and taken down just like the full size.
I took over the copyright to the designs over ten years ago and have been enhancing them to take account of technology changes, particularly in lighting, and the loss of several major suppliers.