Driver cutouts for the first baffle were made using a router freehand.
I began marking the holes for the second baffle using the first baffle as a template.
I then decided that this was prone to mistakes and it would be better to
use a jig to cut the circles instead. The DIY circle jig is simply a plank of wood mounted on the
base of the router with a nail accuratly measured to protrude at the required radius.
It is then a simply a case of
inserting the nail into a pre-drilled hole in the center of the circle you want cut, and spinning the router
around for a perfect circle.
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