I wouldn't screw around with a torque wrench. I own a Snap On and it has served me for 15 + years. I was a former mechanic and you shouldn't screw around with tools like that.
I love the job. Worked as a mechanic for 15 years and was lucky to get on the job the last interview I was allowed due to age. It has its shitty moments like any job, but I think the few pros far outweigh all the cons.
John was on "the list" of Mass approved firearms instructors in my area. You see, I needed to take my firearms safety course and I was looking for someone local to help me out (Yeah, I know we all hate it). So I called John, and I asked him if I could come by for a rectification, he said yeah...