Well, the fun ideas keep bouncing around the Typosphere! Joe is now mixing the idea of Stereograms with the thermal printing cameras to make 3D Thermal Stereograms, which I of course had to see if I could get working with my viewer, because my brain doesn’t do the crosseyed 3D thing, magic eye stereograms don’t work on me either.. 
So yeah, a report of the Austin Selectric Rescue 3D printed Selectric element breaking in use. Probably too early to have a diagnosed cause and fix yet, but you can be sure that Dave’s 1-year warranty covers any issues like that and he’ll ship you out a replacement in a rare case like this. Mine? They’re all still working fine – no breakages or chips on the type! (:
As it turns out, Joe’s stereograms are much too widely spaced to work with a normal 3D viewer – I suppose it *has* to be spaced at eye’s distance apart to work with a precision instrument like that $1 viewer :D
Perhaps vertical prints can be put close enough together?