On Thu, 12 Sep 2013 07:54:14 -0700, Pat Barber wrote:

Those inserts are very important.

Well, yes, but you don't need to buy one. I took the baseplate off my
router and put a bushing in it to match the router plate opening.
Centered the router to the plate just fine. Of course, you have to be
sure your router is centered in its base plate to start with :-).

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This message was for rec.woodworking - if it appears in homeownershub
they ripped it off.