Last I checked, about a year ago, they were still developing, albeit producing documentation at a pretty slow rate. I think they are still iterating a fair bit

Last I checked, about a year ago, they were still developing, albeit producing documentation at a pretty slow rate. I think they are still iterating a fair bit on the micro tractor. But overall it seems there was a flurry of activity around 2014 but then it has tapered off. IMHO, I think they set their sights a bit too high, with the whole construction set. Would have been better to focus on just the tractor first, getting the documentation really hammered out. It is such an essential piece of farm equipment. But as it stands, nothing on their wiki is really viable to contribute to, because you can't really work off of it.