Hi everyone, Just got a manfrotto 680b monopod, but a few things have gotten me very confused. This has mainly to do with the leg extension locking tension, and is best explained in pictures. My confusion started when i opened the manual: http://ultimatebirding.com/680man.jpg As you can see, there is a part M in picture 1. This part doesnt get mentioned anywhere in the text. Then only similar thing that gets mentioned is part N in picture 5. Just a typo i thought... but no, there was more confusion to come. The key N (and the key M, which i think are supposed to be the same) is a hexagonal key. On my tripod, at the place where it is used in the picture to adjust the locking tension, there is a round nut! http://ultimatebirding.com/monopod1.jpg So i figured, maybe the round nut is just a protection cover, and the actual nut to turn is underneath, but the round nut wont budge. So, i was wondering if there are any other people out there who own this (or a similar) monopod and can help me clear up my confusion.. Help is much appreciated. Oh, and one more thing. http://ultimatebirding.com/monopodscrew.jpg Is it me or is there a spring missing in the circled area? There is a crevice for a spring just like on the top two locking clamps, but on the third locking clamp the spring seems to be missing. Is this by design, or have i been shipped a 'faulty' product? In any case, I'll be giving the shop a call tomorrow and see what they have to say. Hopefully someone on here can help me out too. Again, thanks very much.. D.