I had no thought as to what the final shape of the seat should be. I decided just to design it on the fly at this point. I thought leaving it square was a bit lame, so I sawed off the corners (once again at the exact angle of, "that's about right"), chamfered the sharp edges, and generally fiddled with it until I was happy.
|And a little wax before glue-up.|
View the rest of my build here.