Just a test with this little tut :)
http://www.instructables.com/id/E5F6IEWJG0EWPKHEVR?ALLSTEPS

How to retake something from an image :)
If the profile is some elongated from the original tut it's because image loaded seems different than the real original :)

In spite of this no particular difficulty except to fit middle of lines, points, and snap points between them + measures (when exist) on the image!