An earlier thread on torque wrenches advised against clicker style because you can apply too much torque on small bolts before the clicker activates even when properly calibrated. The beam type were judged better for bike work.

I have one torque wrench. I made it for about $5. It is quite accurate. It uses a fisherman's scale and a steel bar. I calibrated the scale with weights of a known value. Send me a PM for more details.