I was getting ready to go make box joints on some projects I'm workng on and thought I'd brush up on the subject by watching a quick video from the Router Workshops DVD, series #1, show #104.
As Bob was readying the router and table for the process, he placed a brass insert into the router base to close the hole diameter down for the spiral bit he was using. He then mounts the router and base into the table and snaps it tight with his customary "fist pop" and proceeds to put the box joint jig in place over the base for the cut.
The question this raises for me is: Why would the brass insert be needed in this situation if you are already covering the hole with the box joint jig? I am having a hard time understanding this one, but I'm sure there is a good explanation in there somewhere.
Curious minds need to know these things.
