Joe, that hole is the modification for people who own the Vacu-Plate system. If you look at the second photo in my first post you will see the jig as it comes from the factory. It is next to the opening in the mounting plate that the sawdust is collected through. With the plate as it comes from the factory all the sawdust shoots off the end of the table. The modification of cutting the hole through the plate allows the Vacu-Plate to function and collect the majority of the sawdust.
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Mike |