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Message: <blockquote data-quote="gellis4" data-source="post: 202104" data-attributes="member: 547756">There is some hole making thing for a router.  The router clamps onto it, and there is a pin on the end of it.  You drill a little hole where you want the dead center of your hole to be, put the device in it.  Turn the router on, and move it in a circle.i wish i had a picture of it..caraudio shops might have some templates.And to make your own, you can just use a compass.  Make the compass exactly 7.5" from the pen/pencil, to the other tip that holds it in place.but first, you have to know what size cutout you need for the sub, it may not even be a full 15".Hope i have been some kind of help, and goodluck--Greg.</blockquote>

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