good stuff, but I simplify it further since I am good at math but lazy. I assume that shooting a disappearing target is not worth it unless:
my sights will be right there anyway and it's an easy shot, or
the stage is unusually low hit factor.
The matches I've shot in oregon have these stoopid fast drop-turners. The stages where I have ignored them have always been among my better stages, with my HF closer to the top dogs.