I need to get a torque wrench for working on my bike. I've been looking at Cambodian Tire, Sears, and KMS. Does anyone have any tips that can help me choose. They range from $29 to $349 and I have no idea how much I need to spend to get one that works. I'm thinking 1/4" drive would suffice for pretty much everything on my bike. Am I right, or do I need a 1/2"?