The rapid adapters are inexpensive, and I definitely recommend. Most theater shows I strap my stand to the seat with a generous number of bungee cords so I don't have to extend the tripod and block the aisle. My stand has air cushioned risers that can not be rotated.
With the quick adaptors I can lash my stand down, then tweak the final positioning of my T-Bar by rotating the quick adaptor. Pretty handy to be able to toss things up without having to worry about final position of your T-Bar based on a fixed thread post.