blueman wrote:


However, now whenever I run the saw, there is a high pitched sound
coming from the blade "rubbing" against the sides of the insert
whenever the blade is at any height above the insert.


I wouldn't worry about it. The noise may be caused by the air coming
off the teeth of the blade "whistling" as they pass through the insert.
In any event the slot will widen a bit due to slight deflections in
the blade as it is used.

--
Jack Novak
Buffalo, NY - USA