Some gift items I have been making lately made me wish for an offset base plate on a plunge base. I had made an offset base plate and it fit this model router base but, was oriented wrong for what I wanted. I was going to drill an additional set of holes but, picked up this Rockler base on the cheap as it was missing a couple pieces that didn't matter to me.
The insert on this base sits over 1/32" shy of the base face(?) so I shimmed it out with some tape and an pieces of an old frequent flyer card.
These machined centering pins can really take your guided routing up a notch on detail work.
I center the base plate over the pin and mark the holes. I then drill a through hole and a counter bore to accept the screwhead.
The through hole and counter bore are over-sized to allow adjustment. Using the centering pin again I screw the base in place.
Now I can lower the motor with the usual grips and then move my right hand to the outboard handle position for better control over tipping. Any of you who have routed a juice groove in a cutting board or a piercing in the end of an A&C bookcase panel know that even a small tilt of the router spells disaster (or at least a very clever cover up).
The moral here is don't hesitate to make a modification if it will help you do things better, safer and more reliably. Most of all, have fun.