I didn't expect this thread to attract so much attention as it's only my first ever thread, and I hadn't even posted on this forum before. The answer to my original question also seems to be a bit more complicated than I thought. Unless it's me who is complicating things?
I will have a look at the Edges and Turns thread then by gkelly.
I will have a look at the Edges and Turns thread then by gkelly.