I made another divided batch of emulsion for R;G;& B sensitization. This time I reduced the SDA3057 from 200 to 150mg/M Ag. The emulsion is not bright cyan, but it is a "khaki" green. Probably a step in the right direction. The unsensitized blue sensitive emulsion is very bright yellow. A cyan would have to be very strong indeed to completely mask the yellow.
Exposing through a #25 again shows strong red sensitivity.