Carl Pennington Fly Tying Demo at Ghillies Fly Shop on Nov. 07, 2009, Colorado Springs, CO. The D-Rib Golden Stone is one of the coolest flies I have seen. It is a perfect match to our local stones and is a very durable fly. Try this in any of the stretchs of the S. Platte River. Carl is from Denver, CO and is a fly designer for Montana Fly Company.