small hole circle router jig, with pictures

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Made a few of these - this one took less time and better than others.
Just set steel rods in wood :smash:

The base has a thumb turn to drop into wood.

btw I...going to mark depth on Alum base, so know when almost thru (-; (-;

btw II... retrofit speaker box, the cutout was for a 12" - glued in plywood ring (lap) going to cut for 10".
 

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