Responding to how many jobs get ruined by a small dip, my friend had a whole bathroom floor fail. The tiles cracked along a hidden low spot that a longer level would have caught. He spent way more on repairs than he would have on a better tool.

That reminds me of the time I tried to paint my kitchen. Had everything taped off, drop cloths down. Then my neighbor's kid locked himself out. Spent two hours helping sort that out. Came back to find the cat had walked through the paint tray. Whole project just derailed instantly. Sometimes your plan and real life just don't get along at all.

Isn't it a relief when tricks like beth147's hook work?

Your barber said that?