Oedie, As far as I know, no written directory exists. You have to hunt for a G.D. on your own. I can offer a few helpful hints for locating one though. 1. A G.D. goes goo-goo over galvanized. His mind is clear and his thoughts are sharp. Not clouded by the vile odors emanating from paint and plastic. 2. A G.D. knows when to bite his tongue. When his MIl says that his shiny new galvanized harvesting beast looks funny, he doesnt risk the harmony of his happy home by mentioning other things that look funny and mis-proportioned. His eyes just twinkle and a smile crosses his lips as he thinks about the many uses Tbran has suggested for a noisy MIl. 3. A G.D. has been to the mountain and studied the teachings of the wise ones. He can cite you chapter and verse from The Hypers, Hurtt, the Brans, and Rolf. 4. If you are in a crowd of combine operators and you want to separate the paint from the galvanized, just mention, Pull the rotor. Notice that some will get wobbly in the knees, their lips will tremble, and their eyes will dart from side-to-side, like a Navy carrier pilot thinking about a night-time carrier landing in a howling gale. Those are the paint and plastic boys. The guys who attach the same significance to pulling a rotor as others do to checking the air in the tires are the G.D.s. There are a lot more signs of a G.D. but these should get you started. Maybe others can add more. Ed in Montana