cujo - you should also look at your torque wrench. We design robotic assembly machines for a living and I used to use my torque wrench to double check how accurate some of our screwbots and fastener tighten heads were . . . what I found out was that my torque wrenches were sometimes as much as 20% out of spec. That is huge when it comes to properly torquing bearing caps and headbolts.
