Latest revision of the one-handed bottle opener. Revision 6 or so failed after a few weeks’ use, but you can see that the problem wasn’t completely solved with my current daily use one (revision 8 or so) because the stress crack is starting in the same spot. In-progress photo of the latest revision (10 – I don’t print all of them) shows how I hold the flat neodymium magnet in the slot with another magnet so the magnetic auto-level probe doesn’t suck it right back out again. This revision is a couple millimetres thicker through the region that habitually cracks, so we’ll see how it stands up.
