QuiltJane suggested that I re-post the following from my blog in case anyone was interested. Some people are very nimble with their fingers and can keep the nice small seam allowance perfectly in place. Not me. I fumble around and at times I seem to be all thumbs. I've tried various methods but I need a good big seam allowance to begin with, then some way to keep the template in place. The following perhaps look a bit clumsy but it is now what is working for me - until I find a better way !
P.S. QuiltJane suggested posting the whole entry from my blog but I couldn't work out how to do that , so have just given you the link.