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I probably wouldn't let the monopod-leg be a deciding factor: it's the kind of thing that may well come in handy once in a while, say, while traveling, but you'll probably want a dedicated monopod, anyway: it's probably neither a wonderful monopod (That you'd have to see for yourself: could be nice, but you may find it shorter than you like, etc) nor something you likely want to subject to the extra wear and tear or possible loss or damage: you'd effectively lose the use of the whole set of legs if anything befell that monopod-leg.
Not to say it does any harm to have it, (I'd probably want to err on the side of simpler construction, but as long as it attaches firmly..
Edit: Having a peek at the website again, it does look as though it does indeed attach well. Like with a big pipe thread, not the camera screw. Very good.
Also, it looks like you add the center column to the leg as well, so it should be plenty tall enough, just maybe not as compact when folded as it could be. ) ...just that, like I said, you'll probably end up wanting to get a dedicated monopod, anyway, if you use it a lot. Those aren't very expensive.
Last edited by Ratmagiclady; 01-28-2010 at 10:11 AM.