I can't think of anyone on this forum who couldn't use something like this on occasion:
http://boingboing.net/2016/07/22/use-this-18-usb-borescope-for.html
Back when I worked Tech Engineering on Minuteman III we occasionally signed out the Wing's $2,000 "analog" borescope, picture quality was terrible.
http://boingboing.net/2016/07/22/use-this-18-usb-borescope-for.html
Back when I worked Tech Engineering on Minuteman III we occasionally signed out the Wing's $2,000 "analog" borescope, picture quality was terrible.