The nice thing about the Manfrotto/Bogen tripods and monopods is that you can adjust the tightness of the leg clamps. Over time, the clamps may loosen slightly, but they're easy to adjust. On each clamp, there is an upper nut and bolt, which secures the clamp to the larger tube. Then there is a lower nut and bolt, which you can use to increase or reduce the tightness of the clamp, by using a slot-head screwdriver to tighten or loosen the bolt.
Try tightening it just half a turn. If it still creeps downward under load, give it another half-turn. As long as you're able to snap the locking lever into the lock position without too much effort, it's not too tight. This applies to the series just before the present line. The new-style clamps may be a little different. I haven't looked closely at them. As for Kathy's wing-nut style clamps, they do require more force to tighten than is comfortable for most people. My 190 Short would creep downwards even when tightened firmly, so I finally found another set of legs (190QC) with flip-style leg locks and slipped the center-post onto them. Much better setup. Take a look at the new-style Manfrotto tripods with the new larger flip-levers. They should be easier to use, and more comfortable. Hope this is helpful. Pat White
