Hi
Sorry I said ;

"If you use the build in paralell land and move the router "forverts"
that's away from you, then that land offcaurse must be resting on the
edge at the left of the router. "

Wrong running a router with the build in land ,making strips , you
place the build in land on the right side offcaurse, as the router tend
to mill it's way left mooving it forverts --- so a plank to keep the
router in place must be on the right side and if you use the build in
land it's on the right side moving the router forverts -------