I started forming the first two ribs the other day. It takes a bit more work than I expected, especially for the ones off center. They have a twist in them that makes it take a little longer to get right. Also, planing down the edges to get a good perfect fit BEFORE putting in the spacers. But it's coming along and hopefully by the end of this weekend I can have the first 3 ribs fitted and start gluing!
As you can see, there are still some uneven gaps between these that I must correct before continuing...