From: "CRAIG GAINZA" <cgainza@msn.com>

Check out Sacramento Sky Ranch.  I believe it is http://www.sacskyranch.com Run a
search on torque wrench calibration once on their web site and you will find
some interesting info.  I definitely think it is worth it to calibrate.
Keep in mind the position of your hand on the wrench will also vary the
torque, no matter how well it is calibrated.

Craig Gainza
IV-P