Even working as a mechanic for years... I normally don't use a torque wrench unless critical dimensions can be affected. I used them for assembling my motor and trans. K-frame bolts were actually above what mine would do. I maxed it out and gave them another good nudge with my 1/2' breaker bar. For general assembly, you get a feel for what is right. Even at work on printing presses, very limited use. Of course that means finding fasteners that someone else tightened WAY to much and some ready to fall out...
