I still don't understand how the transition from 30.00fps NTSC B&W to 29.97fps NTSC Color was accomplished. Example: CBS broadcast some programs in Color from late 1953 till (full prime time color) 1966, did CBS switch from 30.00 to 29.97 for the Color broadcasts, then back to 30.00 for the B&W programs, or did CBS use 29.97 for all Network broadcasts (B&W and Color)? Kirk Bayne