I have the 11/12 F/I/S. It weighed only 800 grains out of the box instead of 845. Not sure why. After casting a few times I took 5 feet off the tips which allowed my 2 and 3 gram fly's to turnover better at 40 feet and I use leaders tied up thick like 50/40/30/20 lb. I have been using it on my CND Salar and at 750 grains It will travel 110 to 130 feet, with little effort. I may trim it a foot or two at the rear as it feels like I'm just starting to overload the rod and take the forward cast a little deeper into the butt. I like the head as it gets the fly down quick. I had thought the thicker section in the middle would feel or cast weird, but there is no problem. On closer examination, I can't see a difference in thickness on the 11/12. Also, when I weigh the head in 1/3 sections, the weights are the same. Maybe you can see the difference in the lighter heads, I don't know. Overall, I'm happier with the head than I thought I would be.
Matt Burke