I did not tie these, but rather borrowed them from the SE Flytying Forum (Czech Nymph Swap) for your gratification. I have overwhelming hits re CZ Nymphs so your interest in this is apparent. I wanted you to at least have something appealing to look at and help motivate your tying going into the weekend. What these show are the inner and outer ribbing that the pattern calls for. Some that you see only have the exterior ribbing and are akin to a scud pattern in construction. Check out the forum and enjoy some nice flies.
SwittersB & Exploring 
