For size reference, the log on the mill in this image is 17 inches at the butt and 13.5 inches at the tip and measures 31 feet long. (the tip end is nearest the camera)
With the half sills in place, tonight we fitted our first 3/4 sill log. This means that we were able to scribe and notch for the first time in a while. It was an extremely exciting evening for us, and our visitors. If you ever decide to take on a project like this, be aware upfront that you will have a lot of folks that want to come and watch the scribing and notching. You will also run into a lot of nay-sayers along the way too. Until they watch it in person they will have a hard time believing that it will fit together so well.
As you can see in this image our first notch fit nice and tight just like it is supposed to and once we tighten it down to the all-thread anchor rods it will be an amazing fit. After cutting the notches we put it in place for an initial fit and found that it was nearly perfect. After a very small amount of tweaking, we made a second attempt and it slid on perfectly.