Yes, I suppose that you could, but what I do is just sacrifice one piece of film and make test strips from it. And then I determine optimal exposure and development just like I would for paper.
Not for contrast control. It won't work like MG paper, if that's what you're asking. But there are many other ways to control contrast, e.g. by fine-tuning exposure and development, by dodge and burn, by bleaching and SLIMT (which I haven't done, but why not). Colour filters will allow you to play with with tones correspond to particular colours, so a colour head will be nice to play with (I don't have one).
Sounds solid. I do have a color head, so I was wondering if you had experimented with it. Just was curious because I know for different alt processes, one needs different contrast curves.