Going over threads from about a year ago, some links appear dead:
http://docs.carbide3d.com/article/169-shapeoko-3-how-to-check-the-pulley-set-screws
http://docs.carbide3d.com/article/47-measuring-runout
http://docs.carbide3d.com/article/42-how-to-calibrate-the-machine-for-belt-stretch
are some examples. I can find them manually, but can you setup some redirects from the old URLs to the new ones?