Part(anon): a part that shall remain nameless. Whenever I get a new spool of filament, the first thing I do is print one of these to: 1) dial in print settings/test print quality, and 2) keep on hand as a material sample (they're conveniently stackable). I designed this, not to be a "torture test," but to test printability on features that I would expect a good filament to handle cleanly.