I bought parts, and had it all unit tested, really. All four axes worked, I had the board running my own firmware build I could play with. The extruder got hot and appeared to be functioning correctly with the thermistor. But I had a goof getting the bed assembled/leveled which forced me to tear it off and order new bearings. And by the time those arrived family and distractions had pulled me away. And of course by now the Prusa is old news. But I'll get back to it someday, if not with this printer than with another.