Hi ceetee
You'er welcome,, the Jasper as a built in error that you can fix easy,
The mounting screws holes are drilled to deep and they do like to snap out the plastic BUT if you drill out the center hole to take on a 3/4" or 1" hole to take on a brass guide the jig will stand up very well and it's makes it easy to use by just dropping the brass guide in the router then just drop the router in the jig hole,, no screws to hold the jig to the router is needed plus it helps keep the cord out of the way because the router can spin in the jig...
plus you can use a bigger bit when needed like a 1/2" one...unlike the one called for by the jig ... ( 1/4" bit size )
final diameter,, is a easy setup ,just drill your 1/8" hole, set the Jasper in place with a brass guide in place that will take on a standard round pencil ,spin the jig with the pencil in place then lift the jig off and get your ruler out and see what you got b/4 you do the route job...your pencil mark will be right in the center of the router bit path...then just do a bit of math for the bit you are going to use and your set...then move the jig to the right hole and check it one more time, wright that number down then plunge and cut out the lazy susan
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