When we went to Mt Pleasant in 1996, it seemed there were at least 20 model steam tractors. They ranged from smaller than a lawn mower to slightly bigger than a Farmall Cub. They had scale-model sawmills they ran with some of the larger ones. I even remember a couple of the tiny ones in the tractor pull--they pulled a sheet of steel with cinder blocks piled on it. Needless to say the little ones didn't blow as many cinders into the crowd as the big ones did!