Here's the example that set the stake in my heart.Two foot effective length torque wrench.Six inch extension.One hundred ft/lbs indicated on wrench scale.Now I know it takes a 50 lb pull to get that 100 lb indicated.I also know that my wrench and extension together act just like a solid bar,there's no magic happening at the juncture of the two.Therefore,a 50 lb pull on a 2.5 foot lever equals 125 ft/lbs of torque.Frank's formula predicts 125 ft/lbs. My POS predicts 150 ft/lbs.Somehow 50 lbs on a 2 foot lever does not equal 100 lbs. on a 1 foot lever.

100 ft lbs of torque delivered via 2' torque wrench = 100 lbs on a 1 foot lever. KISS. <img src="/forums/images/graemlins/coolg.gif" alt="" />