Upon further examination. (I don't know how long) I manged to mine through the blender
source code and find where the draw the 3D cursor code was.
The only way to know for sure was to make a simple change and prove to myself
that the code was what I was indeed looking at.

And so I managed to turn this little candy cane circle and cross hair thing...

Into this boring white one.

It means I know what I'm doing in the blender source and I'm getting closer
to knowing how to modify it to produce a new editor space type.