A little off topic, maybe, but I have been doing a lot of spaced omni recordings lately using a two Super Clamp set-up with two 122B extension poles. Usually from a balcony rail, where I can space the mics as far (or near) as I want. At a moe. show a few months ago, for example, I had a nearly three meter spacing with no problems. I generally go with about a meter, though, as it is easier to deal with the cables (and, like Gutbucket, I find that to be a good distance). I have also clamped to a vertical rail in a wide V, which can easily get me a meter or more of spacing (a little trickier to get the mics in the same horizontal and vertical planes, but do-able). I started doing this because it is hard to find sufficiently wide bars and those that are out there are either heavy, bulky, or pricey...