Oh one more thing, just reauthoring the manuals now, would people like the entire thing in one big PDF or split up into individual manuals as they are published?
The way I've made it now is one big PDF with an index page that takes you to the subsections (which are the individual manuals). These then have a index for their contents etc.
If I split them up the PDF's will load faster, but it might get more confusing to find out what manual is for what system of the car etc.