The dadiOH entity posted thusly:

Oleg Lego wrote:

Well, that sounds easy enough, but of course I ran into problems you
didn't, because of the weird hole size in the router base, and my
requirement to incorporate guide bushings.

And that incorporated bushing requirement is the entire source of your
difficulties. Frankly, I can't see any reason to use them on the table
insert. Much easier and more accurate to simply use bushings on the
router plate itself rather than the table insert. A whole set is cheap
(less than $20)...and one really doesn't need a whole set.

Hmm... are you saying that you don't use bushings when routing with
the router mounted in the table?