[chiphead]

Oh yea, keep everything clean! I clean most parts with brakekleener, blow them off and lay them on a cleaned workbench. Then I only pull parts from that clean workbench for installation. Be careful of stray fibers from clothes, shop rags and paper towels. Be wary of cross-contamination from dirty parts or dirty tools. I wear rubber nirtile gloves and change them often. Make sure the area is free from sand, dirt, metal shavings, etc. Bag engine with large clean trash bag when work is not being done.

And if you get tired, stop. You will rush and make mistakes if you are tired or distracted. If something doesn't look right, stop. Beware of the "it'll be fine" monster.