Yes, the revisions......very vital! I mean the hills do move around a lot, and airports go up or down all of about 2' (didn't Gatwick change from 198'?), and ILS frequencies can change (almost never). I know aprons and taxiways get built, but no airport needs such regular revisions, especially never visited ones when you see what the revision is all about! And those interminable SIDS/STARS- I've come to the conclusion it's a mark of respect for some airports to have about 30+ pages of overcomplicated SID/STAR procedures- like comparing annual passenger numbers with each other. Gatwick procedures seem slightly bizarre- I wonder how some pilots from certain continents on first visits cope!