Definitely keep us posted on the lock up issue.
As for torque wrenches, it's good to get them calibrated when you first get them if they haven't been at the factory. If you can get them checked periodically, that's good too. If they stay in a case and aren't abused, once every few years is fine. I use them almost everyday so mine are checked every 6 months but that is quite excessive for most. Dropping them on concrete, say off of a toolbox, voids the calibration too. That's just a PSA about torque wrenches.