Thanks San Diego for encouragement. I will have to do some calculations on pulley size to determine speed ratio between the treadle wheel and concentric wheel connecting to the saws lower arm. I do have some ideas for the design of the saw. The treadle frames are in perfect condition. They look almost new. I will post pics when I finish it. They deliver our building next Friday, and will be erected the next week. It will be a few weeks to insulate, install AC and electrical. Then we can move all the woodworking tools in and start working again......Steve