Looking good! However, 80/20 mix is not going to give you much of a difference, like you see. Remember that you want to stop the light bleed to get better detail. I would try the 50/50 again on that predator model, to make all the details pop, or at least a 60/40 mix.
For something big like the Eiffel tower, a 70/30 mix would work well. Be mindful of the railing thinness. The b9 resin cures much softer on the form1 (gets harder in the post-cure because part of it cures using visible light), so if the railings are too thin, they become too flimsy and fail.