remember that in working with wood it is often possible to fill, patch, and
fake a great finish. While a perfect fit would be nice many (most?) of us
are not able to accomplish that (and with some of the new glues the perfect
fit is not desirable)

save your sawdust--mix with epoxy and fill as needed.

seams that are glassed can take a lot of less than perfect fit and seams
that have a fillet . . . .

now Mr. Sawdust in his book on setting up the Dewalt RAS talks about getting
tolerances of 1/128th of an inch. That is lost on me as I have trouble
seeing a 32nd on the rule and a 64th I just can't even see.

give yourself a break and enjoy tolerances that a real person can sometimes
do.

Brian