The "corner of the transom" is where the vertical portion of the stern meets the bottom of the hull, in the center directly ahead of the rudder. In measuring boats over the years, this spec tends to be quite accurate as delivered. As a higher numbered hull (311) you are likely to have a short, fat chord length. In my opinion general fairing for smoothness will help. To get to templates, you'll be adding material to the leading edge, which has the added benefit of moving the center of effort forward. I'm out of my league on this both in terms of design theory and repair, but I'm told that is a good thing_
