My big regret was not buying a cased Springfield Armory star gauge device which was for sale at an Ohio Gun Collectors Association show in Columbus years ago. It was at the first table I saw when I went in the door, and if I had bought it, that would have been the end of my buying at that particular show. I passed it by, and by the end of the show I was so dazzled that I forgot all about it until I was some 200 miles down the road on the way home.