Thanks Ggal, I always use Topstitch needles for everything, I tried a 70 then an 80, even went to a 90 which has a large eye, still shredding. I changed the tension numerous times but was still having the problem. I eventually used another brand of needles that I had and a size 70 and guess what no shredding and I managed to finish the last 6 blocks in about an hour. Just have to sew the binding on tomorrow. Then it is onto another ufo, I am trying not to start anything new at the moment, as I have several (who said several) projects already started and need to get at least some of them finished before Christmas.
Since I started patchworking I have always started a big new project on Boxing Day, and I have a Bargello kit that I want to make . It might have something to do with the holidays, the house has been spring cleaned and I have cooked for an army so not much to do on the home front