I did some checks with tennis, soccer, and skateboarding that I don't normally shoot but all appeared okay with auto focus track and Continuous Shooting. The real test is shooting what I know, race horses. Looks like my D2X is okay. 80-200 AFS f2.8 lens in use. I don't trust Clubphoto for display of web shots (sometimes good displaying on other sites, sometimes not). Since these are test shots, no more than 10 seconds of post processing. I already saw what I needed to see. I'm breaking the shots into three parts so that it won't overload a single thread. Part I is a series of a race horse coming towards me.