I just received a 'Speed-Shooter' harness system from Whistling Wings here in FL. I am finding that carrying the Camera for hours is now becoming a chore - I'll be 80 in a few months. . . The Cotton Vest wasn't really doing it for me anymore. If I have the camera mounted on it for any length of time my back would let me know about it. So I started wearing a flexible back brace and that helps a lot. At the Wetlands I am holding the camera 90% of the time so the vest wasn't helping at all there. Hoping this harness system works for me. If it does I will invest in some longer faster glass.