I've used that in the past and it's really gotten me out of some jams. Had an Isuzu Trooper that I had the shop manual for. Changed the timing belt, but couldn't get it to run correctly afterwards. Reread the manual and reassembled the engine several times. After about a week, I purchased a subscription to Alldata.com and found out that a TSB had been released for this issue because the marks that were referenced in the manual for setting the timing were incorrect.