Hot take: I was wrong about torque wrenches being a waste of cash
I used to just tighten stem bolts by feel, figured a $60 Park Tool TW-5.2 was for guys who torque their own oil drain plugs. Last month a customer came in with a carbon bar that had a hairline crack right at the clamp, and I knew I'd done that one by hand six weeks earlier. So I bought the wrench and started using it on everything, and about half my "good enough" tightness was actually way over spec. Now I want to know, what's the one calibrated tool you finally broke down and bought after being stubborn about it?