Of all of the dyes made only a few passed muster and made it into products. Kodak produced over 2000 new emulsions each year but only about 20 made it into a new product. The same is true of dyes. That is about 1% so I did not deal with many dyes. Paul is the one that dealt with all of them AFAIK except for the chemists who made them!
As for Bill's comment, I think he has covered it well. You both know as much as I do, but Paul knows much much more. You met Paul at the ICIS meeting, and in fact he introduced you to me! Ask him if you need more information.