After the ribs were on, it was time for the leading edge. The piece I chose was a little (read: WAY) too thick so I brought the whole thing over to the band saw for a trim.
There - that's better. But still square.
I tried using my large block plane to round the corners but it's way too big for such delicate work. Enter Lee Valley Tools and the miniature block plane
After a long time spent planing and sanding, the proper shape of the leading edge emerged.