Ugh, "wasted a whole shift" is the worst feeling. That slow dread when you realize nothing you did mattered. My old boss used to call it "payroll for existing." Makes you just wanna log off forever.

The city put those sensors on Main Street last year, same idea. Hill.ben has a point about fixes creating new issues though.

Oh man, I feel that pain. I tried that exact string trick last year to make a round tabletop. Ended up with what looked like a modern art project, all jagged edges and stress cracks. You start off so hopeful with your little homemade compass, and ten minutes later you're just sweeping up very expensive glitter. Isn't it funny how the old-timers in those videos make it look like breathing?