Centering the base plate?
I can see that you would want to center the base plate on your router, and I understand how you could do that on a blank plate before you drill the mounting holes. What I wonder about is how you would center one that is already drilled. MLCS has a PC style universal plate that comes with a centering tool. Is the tool just to help you figure out which of the dozen or so holes to use or is it possible to shift the plate after the screws are snug but not tight? If so, I'd be a little concerned about how well it is going to stay centered.