I like the concept but also understand the fear of losing a set.
I recall someone posted on here asking us to keep an eye out on Bisley's Century range for a set that had ben left behind. I was on site at 07:30hrs the next day as it coincided with a shoot at the BSRC range and spent 1hr looking in all the ditches from 100 back to 400 yards but never found them.
K