Platypod Platypod Disc Accessory for Platypod Max/Ultra/eXtreme, Arca-Type Mounting Plate, Converts Max/Ultra/eXtreme to 1/4"-20, Helps Level the Max/Ultra/eXtreme, Top: 1/4"-20 Male and Bubble Level, Bottom: Arca Dovetail and 3/8"-16 Female TRIPODS...