^ This is why 2manyrocks and I have been discussing ways to equalize conditions to separately perform your "pillow test". We both own CM3s, he has a stock 70D and mine is modified. I'm proposing going a step further than the pillow by wrapping each mic in a towel first to avoid HF leakage, and then in fleece blankets or acoustic foam, since we both have some. It's not perfect, but shirt off someone else doing a before and after themselves, it's the best we can get in terms of what you're suggesting.