I have built model aircraft forever. All kinds from pistachio indoor flyers to yow meter RC gliders. My work is used for advertising such as Dave Diels 1/24th scale rubber powered WWII and Ecardmodels card models. I have been building card model aircraft for about fifteen years and have over 300 at scales up to 1/33rd. Some built better than others. I am in my 70's. Still working, having failed retirement three times do far. Among other things, I am a retired USAF Colonel.