Sorry, I misunderstood your question, so disregard my earlier answer. Yes, use it as a trigger. It also functions more or less as an anchor, because it should touch the same spot on your nose each time. It's more of an anchor when you have a dead release, less of one with a dynamic release.
Mount the feathers wherever it takes so one touches your nose at full expansion. If you have to mount them too far forward, it may indicate that you are not drawing with your back muscles in a J shaped draw, but may be drawing straight back with your arm muscles. But I need 2", some people need more, and that's okay as long as you're drawing with your back muscles.