This was a difficult pattern, indeed! My first attempt came to a rapid end when I realised I had gone backwards and could go no further.
This second attempt I did manage to go all the way round, but the centre is a right mess! I definately need to try again, with a clearer thought about how to do the middle. I am grateful to Fox and Tatting Fool, who had already gone before, because it reassured me to see that I wasn't the only tatter to get into difficulty with this pattern. The scanner is the one at work, and I have a few problems with that, too.