My pleasure Lance. My thinking these days is to learn as much as you can, read all the accounts, reports and research, add up all the new questions that come up after you've learned everything you can and come up with your own opinion. WW1 aircraft coloring is such a complicated and subtle thing that I'm fairly convinced that it has no absolutes, only well informed and most likely guesses.
I'm with you on the yellow thing too. Mostly for the reason of why paint elaborate markings with so little contrast? White on yellow, no matter how dark and rich, isn't the kind of thing that would occur to most people. Hmmm, white mustache or black mustache, which one of these? That and the fact that Voss' plane is a one-off in the unit and appears the same as the factory planes. Sure, it could be yellow, and it might have ad white marking, but it seems more unlikely to me. Whereas, factory olive paint with white markings seems infinitely more likely.