pickstock, I did not make one for the reasons stated in my previous post. There are a few sites in Asia, notably India and Pakistan that have some real small scale stuff and some videos on YouTube, but all too difficult to break down into enough detail to let you build. I would like to grow about 5 acres of oats for grain, so I need to be able to pick it up from the swathe or have a proper combine. An AC40 or similar would be enough for me, but we do not have the luxury of old machines that could be refurbished.