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@rpm
don't touch the neck bolts
a truss rod is a metal rod running inside the neck, tightening it causes the neck to straighten (a guitar neck should be slightly concave when strung) against the pull of the strings.
guitar action is determined by three things:
nut height
bridge height and setup
neck action (truss rod)
people are too quick to go for the truss rod most of the time, read the set up guide you posted. the whole thing not just the truss rod section.
putting heavier strings on will upset the action if the guitar was set up for a different gauge
look at sheldon ffs