A guy at my work used to teach Photography class at MSU. He fwd me this pict of a "DaveBox". I assume some of you here have used your own version(s) of this. I've done video calibration on my home theatre projector, so I'm familiar with the greyscale and oversized rubiks color plaque. I grasp how once you snap a test shot with these tools in it will help you balance correctly while doing PP. The other "stuff" is kinda over the top for 99% of us? Was this more important when film was king, but in digital era and PP not so much real usage? Do you guys with your version of DaveBox still use it or it's tucked away not being used?