After Stash Surfing and having a good look round Ravelry, I found a pattern for my Colinette Point 5. It pressed all my buttons - one skein of yarn, no sewing up, completed in two hours and looks rather good! The pattern is designed by Allison Blevins of Tangle. I'm not sure if it took me two hours or not, as I was picking it up and putting it down at first. And I think I would have knitted quicker if I'd been able to locate my shortest cable for my circulars. So I did it all on dpn's. The ones I have for this size are a decent length.
Here is the finished hat!
View from the top, lookin good