Just some observations, from someone who owns torque wrenches, and occasionally uses torque testing equipment.
1. I've always steered toward simple beam-type torque wrenches, even if they aren't always convenient. The clicker or dial type wrenches have much more complex mechanisms. They may indeed check fine when calibrated, but any corrosion or wear, and suddenly they can go on the fritz, and may do so without warning. The beam type units are unlikely to change over time, unless they are greatly damaged. As long as you buy a quality unit with guaranteed accuracy, they are unlikely to ever cause problems.
Granted, the beam type are less convenient, especially when you're doing something like F150 lug nuts at 150 ft-lbs, but screws on guns normally require much less torque, and requires only moderate hand strength.
2. Always apply a smooth, increasing effort to the wrench. If you yank or jerk the wrench you may get it to click, but the torque won't necessarily be accurate.
carry on
