fwiw - anyone thinking of using thread inserts:
do _not_ rely on the package 'recommended' hole size.
I have used inserts from the same purchase/bag in various woods - hard maple, red oak, white oak, poplar.
every single species requires a slightly different hole size to (a) insert cleanly (b) not break out (c) hold good.
brass inserts take a different hole than "same size" stainless inserts.
many designs to insert - different make will require different hole sizes.
I never use (sigh, anymore) and highly do not recommend any of the pot metal cast inserts. don't ask, it was ugly.
those are strictly for "cheapest stuff from China..."
test drill, try it.
test drill again, try it.
brutal, but regrets the only way to make them work.
and, if you screw up - over drill, fill with epoxy. holds quite well.