AAAJohn, There is one drive pin that looks like a rivet that you can drive out of the trigger group. It is the fulcrum pin. Before you drive the pin out you have to remove the lower front screw and spring. The trigger and trigger bar will fall out of the bottom after the pin is out. Once apart, you can clean the factory gummy stuff, rust, etc and dress the lower sear. All of the 700 triggers come apart, maybe its just your gunsmith's way of saying don't mess with it or maybe they just don't know.
I got scolded the last time 700 triggers came up on this forum. After thinking about it, Graybeard's idea is best...don't mess with the screws or take the assembly apart unless you really know what you are doing. I'm also convinced that if Remington was so goosy about playing with the screws, they would have made the trigger without adjustments. A blurb in the instructions seems like an invitation to diddle.