Nobody's mentioned a Haynes ToolTip?
This is usually a complex process in itself, yielding nothing more than a piece of elaborate scrap that will still fail to do the job, prompting the amateur mechanic to say "oh sod it" and source the manufacturer tool...
"The cam cover gasket may be replaced without removing the engine from the frame" (or similar such words) meant that my Honda Blackbird pissed oil everywhere until I could bring some proper time to bear on it and drop the engine out. Getting that big gasket into place with about 4mm clearance was a sod of a job that in the end failed.
Still, I tend to get the Haynes manual when I can. As the article says they tend to be more practical than the manufacturer ones.