I've been going back and forth on this topic. I don't have a lot of room, so adding a router to my table saw extension is desireable; however, I have had to make a cut or 2 while the router was set up but they've never been large pieces.
I've been thinking about it more and I'm wondering if I did have a router in my TS extension and had to cut a large piece, would it be possible to pull the router without losing the setup. If the router is mounted on a plate that can be pulled out and the router fence is attached to the backside of the TS fence, it seems I could clamp a block to the the guide bar (on either end) to set the location of the fence and pull the router plate, use the TS, then put everything back without losing the setup. Seems like a small hassle but I'm sure there are many opinions.
“The single biggest problem in communication is the illusion that it has taken place.”
George Bernard Shaw
Redondo Beach, CA