Exactly, the readout said it was fine but the whole frame had this high pitch hum the monitor would never catch. My old foreman always said to put a hand on the table, feel the vibration in the handles. We stopped a run last month because the feed just felt lazy, no alarms. Turns out a hydraulic line was starting to go soft. Data came back clean an hour later, but by then we'd already swapped it and saved the batch.

Read your post and laughed because I said the same exact thing last year. Called them overpriced toys until I stripped a drain plug on a customer's truck using my old clicker. Now I feel like a clown for fighting it. The beep and vibration tell you exactly when to stop, no more guessing if you heard the click. My shop's ancient calibration gear can finally collect dust. You're right, once it saves your butt on one big job, you're hooked for good.