Has anyone tried using the retroreflectors (IE: the little circular reflectors you can use on mailboxes, marking ditches, etc) sold at places like Lowe's and Home Depot with a laser rangefinder? My thought was that they could be used to increase the usable distance of mid-range LRFs, especially when trying to work out a match COF and you can position a cluster (3-5 of them) at the firing point and lase back from the targets. The one thing I am really not sure of is if the clear ones would work for the IR laser in a rangefinder.