[Big-Foot]

I have been out in my shop fiddling and I've devised a plan (no fabrication yet) to mount a hinge on the bottom side of the nose (just in front of the nostril hood) that I can mount the plate to. While underway, the flow of air should push the plate up against the bottom of the nose. When stopped the plate would swing down and be visible through the grill opening.
Now there should be some means of limiting and dampening motion so it doesn't swing like laundry hanging on the line, but I think there's something to it..