Check out the new, current issue of Diesel Era magazine, Volume 17 - No. 4, July/August, 2006. They have done a neat article on Frisco's F-M H-10-44s and H-12-44s: "Tulsa's Opposed-Piston Residents", about the 25-year career of the Frisco F-M units, mostly in and around Tulsa. They have a good cross-section of pictures of the units, in both black & yellow and mandarin orange and white, many in color, plus a nice write-up. Nicely done! Ken Meteor910