The TA-3-PF Series 3 Tripod Platform from Really Right Stuff is compatible with all Versa Series 3 tripods, and the platform is set inside the yoke of the tripod and locked into place with the included set screw. Furthermore, on the top of the platform there is a threaded 3/8"-16 stainless steel stud, which is compatible with most tripod heads on the market. In addition, you have the choice of using the tripod platform with or without the Series 3 Quick-Column inside your tripod.
Compatibility
Versa series 3 tripods