I thought I had plumbed every depth of the tutorial links, but I don't remember seeing one that contained the above DS monogram. The only one I found that was similar, was Sam's 'Drawing Leaf Script' tutorial. I guess I'll have to delve deeper and see what I missed.
The J.M. Bergling books are in my opinion some of the most accurate and beautiful examples of lettering and monogramming there is. They are well worth the cost and a must for the letter and monogram engravers.
Ron S