They look really good, but that's a lot of 3M mounting foam. I'm sure this was tested, but wouldn't mounting tape around the perimeter of the piece be just as effective? I totally get that it needs to be a semi-permanent fixture that's not easily removed (either accidentally or maliciously), but man, that stuff really, really sticks. I used it to temporarily mount my laser shifters before drilling holes for screws, but 18 months later, no screws, and the laser shifters are rock-solid, it what's a fairly aggressive environment (low on the front bumper).
Cool idea though.
side note nice lanyard and FobPocket