First cut of my own file failed

[Jules]

Hand drawn with the intention of turning it into a single line vector file is kind of tough.

You will need to do what is called a Centerline trace in Illustrator. There’s a tutorial here:

How to get a Centerline Trace in Illustrator

A Centerline Trace is important if you want to take an image that consists of unfilled lines, like a coloring book page, and place just one path for cutting or scoring down the center of the lines that you see on the page. The default Live Trace option in Illustrator doesn’t create that kind of result without special modifications being made to the Live Trace settings used. The normal default will result in a filled compound shape, with vector paths placed into the interface wherever there is …