OK. i reviewed #14. I still have the question about the SBN-600 remote vs. on the camera. I see that you were comparing the SB-600 red light pattern with the built-in white light flash for AF assist.
As to shooting, you suggest acquiri9ng focus with AF-assist, locking focus, turninig off the flash, and shooting single frames when the subject is in the same focal plane. It could be clumsy turing off the SB-600 whiler trying to track the subjec. Gray-star has suggested repeating acquring focus with the SB-600 by repeatedly half-pressing the release. This seesm easier mechanically than turning off the SB-600.
Does the SB-600 use less power for AF than for the image exposure? I am thnking about batttery consumption.