The TA-2-QC from Really Right Stuff is a variable, rapid center column that can be added to Versa Series 2 tripods in order to increase their versatility and maximum height.
The process of installing the column is simple, just remove the tripod's original base-plate, mount the center column in its place, and then reattach the base-plate to the top of the center column. Installation is so simple that removing the column is just as easy. If you're traveling and need to reduce your tripod's weight, or need to utilize your tripod's minimum working height, just take out the center column and reattach the base-plate in its original position.
In terms of technical specifications, the TA-2-QC features a native length of 12.3" and weighs just 9.1 oz. When attached to a tripod it provides 9.4" of total travel distance from lowest position to highest position. A threaded mount on the bottom of the column retains the use of the ballast hook which may be reattached from the base-plate after the column is installed.