Tied this pattern for a western river, in central Oregon. Great success! Thank you for sharing this pattern with the inter-web. Although... I did have some trouble keeping some of the bulk down while tying this pattern. Found some Lead Tape that did work wonders. And oddly enough i did tie this pattern with no weight using a small strike indicator and let it dead drift while walking along the bank of the deeper slower moving water sections and i had caught more fish then trying nymph techniques. I had also substituted the Peacock herl for black ice dubbing, and used tan UV Ice Dub for the hare dubbed in with the antron. Real similar, but that extra flash did seem to help quite a bit especially in months when the caddis larva were actually not hatching.