Forgot to answer the rest. You can adjust the tension knobs so that when you let go of the gear, it stays in that position, and can be moved to any spot with just a fingertip (assuming you found the balance point). You would never have to worry about pinched fingers as you might using your 100-400mm on a ballhead. I wouldn't leave your lens on it though and have it flung over your shoulder. There is a part that doesn't always "stay together".