quick release plates
 

I have 3 bogen tripods and have different head on them. I have a 501 and a 501 older model and a 516 ass have "quick release plates" built in I guess but I find myself struggling with them in the field. IS there a good 3rd part quick release so I can get all these sticks on the same page plus one that truely lets you go on and off a tripod in a hurry?