After quite a few chats with the Sweetwater and other people, I finally determined that the current Quiklok mike accessory also fits the 2000 and other similar "Ultimate" brand KB stands and related. From a quick look at mine, I do not think the mentioned 28mm would be large enough; getting the current model (30?mm) provides for shimming if necessary and should work fine.
Nice solution to avoid floor congestion, but there is some shimmer and shake when things get rolling.