OK, so I had a go at the invisible zipper foot in my last post. The instructions that come with it are appalling. However a quick google this morning and the first blog I checked was here. I should have done that right from the start. So I just wanted to say thank you to Kim of All Things Mum for restoring my sanity and if you too are having trouble working out just what those small diagrams are trying to tell you check out Kim's pictures.
And apologises to the zipper foot, as usual it was operator rather than machinery which was to blame LOL.