These Thumbsticks are direct replacements for the Xbox 360 controller. They are shaped like a Playstation with a domed top, but utilize about 5 different dimensions that make them unique from the Xbox 360 and the Playstation. They are about 1mm thinner in the mid section giving 14% greater range of motion and allowing the PODs to sent out a higher value. Cheap knock offs and stock PS3 sticks will limit your range of motion by 12% (26% difference) and will result in Slow Turn because the PODs cannot transmit the proper values.
2x - Custom Convex Thumbsticks
Video on how to replace the thumbsticks (Below)