I recently purchased a book entitled "Floral Pattern Drawing for the Artistically Impaired". The book not only teaches you how to layout a balanced drawing, it also gives you tips and instructions for flowers, scrolls, stems, and leaves. I think that this is what you're looking for on the art side of leather work. I bought my copy through Leather Wranglers Inc (www.leatherwranglers.com). Good luck, let me know what you think about it.