VGB3 leg lock broke

On the velbon vgb 3, the leg locks consist of a lever, one or two pieces of metal and a plastic piece. The metal and plastic pieces rest in a depression against the lever. When the lever is pulled out, pressure against the smaller leg section is released. When the lever is pushed in, pressure against the smaller leg section is exerted, locking the legs in place. On the back side of each joint, there is a phillips head screw which acts as a stop to keep the leg section from coming all the way out. When the screw is backed out, the leg section can be removed, exposing the latching mechanism. If the only problem is that the latch mechanism came apart, it can simply be reassembled. If, however, something broke and allowed the latch assemby to come apart, that will have to be dealt with as well. My guess is that the phillips screw may have become loose, and the latch came apart.