Thanks to the lovely Suz from Patchwork and Play who was nice enough to trial the instructions for me (you should see her version on her blog shortly) and has given me the thumbs up..... I'm now happy to share my tutorial with you.
After struggling to get it to display properly in a post, I decided to go with a link to the .pdf version here instead. If you have trouble finding it or the link doesn't work, please let me know.
And of course..... if you attempt one I would love to see it!