I finished! Although it looks pretty, if I make this doily again I will change the last round so that it lies flat as I tat it. Following the directions as written in Tatting Doilies & Edgings edited by Rita Weiss was easy, but that tatting did not not lie flat. I didn't have enough thread left to cut out sections and rework them, otherwise I would have made changes as I went, just as I did in previous rounds.
On to my next challenge!