Another interesting thing to look into is the Shoe-Fitting Fluoroscope (https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope https://en.wikipedia.org/wiki/Sho

Another interesting thing to look into is the Shoe-Fitting Fluoroscope (https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope). Basically a box you put your feet in, with an x-ray gun at the bottom and a hole to put your face over at the top. Spoiler alert, it didn't end well for anyone.