David, it's clear you research things other than missing aircraft just as thoroughly
I applaud your tenacity - and clear turn of phrase - and hope you are successful in locating whatever it is on the site. On a personal level I will be interested to see how any further work with LiDAR pans out for you; I have long been a proponent of gradiometers for this sort of localised research (assuming the terrain is such that ERM's aren't feasible), but it's always good to learn more about how other methodologies work in different situations.
FP.